Windsor MCP for Email Marketing: Improve Performance & Optimize Campaigns

Every missed signal in your email data has a cost—lost revenue, higher churn, and campaigns that underperform without a clear reason why.
The problem isn’t a lack of data. It’s fragmentation.
Email performance is split across your ESP, Google Analytics 4, CRM, and e-commerce platform. Each tool shows part of the story, but none gives you a complete, actionable view. To answer deeper questions, like which emails actually drive revenue or which audience segments show the most engagement, teams end up exporting CSVs, stitching spreadsheets, and relying on outdated reports.
By the time you find answers, the opportunity is already gone.
Windsor MCP changes that. It connects your email marketing data directly to AI tools like ChatGPT and Claude, so you can analyze performance in real time, uncover what’s hurting engagement, and get clear, data-backed recommendations on what to send next.
No manual work. No guesswork. Just instant insights and better-performing campaigns.
🚀 Try Windsor.ai for free and connect your email data to AI in minutes: https://onboard.windsor.ai/.
Email marketing analysis with Windsor MCP and AI: Use cases and prompts
See how to analyze your email marketing data faster with AI. Each use case includes the challenge, a copy-ready prompt, and the expected output.
1. Campaign performance analysis
The challenge:
Email teams know what they sent, but they rarely can see what actually drove results.
Open and click rates live inside the email marketing platform dashboard, while conversions and revenue sit in tools like Google Analytics 4 or your CRM. Connecting the dots across dozens of campaigns quickly turns into exports, spreadsheets, and hours of manual analysis.
So instead of clear answers, teams get fragmented metrics and end up optimizing for opens instead of revenue.
Windsor MCP connects your email platform data directly to AI tools like ChatGPT and Claude, giving you a unified view of campaign performance.
You can instantly identify which campaigns drive conversions, which ones fatigue your audience, and what patterns separate top performers from underperformers, so you know exactly what to repeat, fix, or stop before your next send.
Prompt: Weekly campaign performance digest
Use Windsor.ai to pull [Mailchimp / Mailerlite] campaign data for the last 30 days. For each campaign include: - campaign name - campaign started at - campaign stats (open_rate, click_rate, bounce_rate) - campaign type Rank campaigns by click rate from highest to lowest. Identify: 1. Top 3 campaigns by open rate. For each, analyze what they have in common across subject line style, send time, and campaigns type. 2. Top 3 campaigns by click rate and the likely reason for strong engagement based on campaign name and type. 3. Any campaign where bounce rate exceeded 2% or unsubscribe rate exceeded 0.5% Format as a ranked table followed by a short paragraph with three specific improvements to apply to the next campaign.
Prompt: 90-day campaign performance trend
Use Windsor.ai to pull [Mailchimp] campaign data for the last 90 days. Group results by month and calculate: - Total campaigns sent - Average open rate - Average click rate - Average bounce rate Identify: 1. Any month where average open rate or click rate dropped more than 15% compared to the previous month. 2. Whether overall engagement is improving or declining across the full 90-day period. 3. Which campaign type consistently produces the highest open_rate and click rate across all three months. Format as a month-by-month table followed by three specific recommendations covering send frequency, content type, and list quality for the next 30 days.
What you’ll get:
A clear picture of which campaigns are working, which are hurting your list, and exactly what your team should do differently before the next send.
2. Subject line and send time optimization
The challenge:
Subject lines determine whether an email gets opened or ignored. Send time determines whether it gets seen at all. Yet most teams treat both as last-minute decisions made in the final minutes before scheduling.
Without a way to analyze patterns across campaigns, decisions come down to gut feel and whatever seemed to work last quarter. Dozens of data points sit untouched in the mailing service while the same guesses get repeated with every send.
Windsor MCP connects your email data directly to AI, so you can analyze what is working across every campaign you have ever sent and make every future send smarter than the last.
Prompt: Subject line performance analysis
Use Windsor.ai to pull [Mailchimp / Mailerlite] campaign data for the last 90 days. For each campaign include: - campaign name - campaign subject line - campaign stats (open rate, click rate) - campaign type - campaigns__has_winner Analyze subject lines across all campaigns and identify: 1. Patterns in subject lines where open rate exceeded 30%: length, use of questions, personalization, urgency words, numbers, and emojis. 2. Patterns in subject lines where open rate was below 15%. 3. Campaigns where campaigns__has_winner = true and which subject line variant won and why. Format as a pattern table with examples followed by five specific subject line recommendations for the next campaign, each with the data point that supports it.
Prompt: Send time optimization analysis
Use Windsor.ai to pull [Mailchimp] campaign data for the last 90 days. For each campaign include: - campaigns scheduled for - campaigns started at - campaigns__stats (open_rate, click_rate) Group results by: - Day of the week (Monday through Sunday) - Time of day: morning (6am to 11am), afternoon (12pm to 5pm), evening (6pm to 10pm) For each day and time group calculate: - Average open rate - Average click_rate - Number of campaigns sent Identify: 1. Day and time slot with the highest average open rate. 2. Day and time slot with the highest average click_rate. 3. Time slots where open rate is more than 15% below the overall account average. Format as a day and time grid table followed by a specific send time recommendation for the next three campaigns with the data that supports each recommendation.
What you’ll get:
A data-backed view of which subject line styles and send times drive the strongest engagement, so every future campaign starts with a clear advantage before a single word is written.
3. Audience segmentation analysis
The challenge:
Sending the same campaign to every subscriber is one of the fastest ways to damage engagement. Different subscribers have different behaviors, interests, and buying stages, and a message that lands with one group will be ignored by another.
Most teams either rely on basic segments set up months ago and never revisited, or skip segmentation entirely and blast the full list. The result is declining open rates, rising unsubscribes, and a list that gets less responsive with every send.
Windsor MCP connects your email platform to AI, so you can analyze how every segment and subscriber group is performing and build targeting grounded in real behavioral data.
Prompt: Segment engagement analysis
Use Windsor.ai to pull [Mailchimp / Mailerlite] segment data for the last 90 days. For each segment include: - segment name - segment total - segment open rate - segments click rate Identify: 1. Top 3 segments by open rate and what they have in common in terms of audience type or segment size. 2. Top 3 segments by click rate. 3. Segments where open rate is more than 20% below the account average. 4. Segments where open rate is above 30% but click rate is below 5%, indicating strong interest but weak content or CTA. Format as a segment performance table followed by one specific campaign idea for each of the top 3 segments,including suggested subject line angle and content focus.
Prompt: Subscriber behavior analysis
Use Windsor.ai to pull [MailerLite] subscriber data for the last 30 days. For each subscriber include: - subscriber status - subscriber open rate - subscriber click rate - subscriber clicks count - subscribers opens count - subscriber sent - subscriber subscribed at - subscriber source Filter for subscribers where subscribers status = active and subscriber sent is above 3. Group subscribers into behavioral segments: - Highly engaged: open rate above 50% and click rate above 10% - Moderately engaged: open rate between 20% and 50% - Cold: open rate below 20% and clicks_count = 0 For each group calculate: - Total subscribers and percentage of active list - Average open rate - Average click rate - Most common subscriber source Format as a group summary table followed by one targeted campaign recommendation for each group, including suggested messaging angle and send frequency.
What you’ll get:
A clear breakdown of which segments and subscriber groups are driving engagement, so your team can stop sending everyone the same message and start targeting the right people with the right content.
4. Email revenue attribution (email data + GA4)
The challenge:
Emails drive traffic. But knowing whether that traffic turns into revenue is where most teams go completely blind.
Campaign reports show opens and clicks. Revenue data sits in GA4. Just a small number of teams connect the two, while the majority keep optimizing for engagement metrics.
Windsor MCP connects your email and GA4 data directly to AI, so you can see exactly which campaigns drive sessions, conversions, and revenue, and stop guessing what is growing the business.
Prompt: Email campaign revenue attribution
Use Windsor.ai to pull [Mailchimp / Mailerlite] and GA4 data for the last 30 days. From [Mailchimp / Mailerlite] include: - campaign name - campaign started at - campaign stats (open rate, click rate) From GA4, filter by default channel group = "Email" and include: - sessions - conversions - purchase revenue - transactions - source medium - date For each campaign, match GA4 email sessions to the 7-day window following campaign started at and identify: 1. Total sessions, conversions, and purchase revenue attributed to each campaign. 2. Conversion rate per campaign (conversions divided by sessions). 3. Campaigns where click rate exceeded 20% but purchase revenue was below $100. 4. Top 3 campaigns by purchase revenue. Format as a campaign revenue table ranked by purchase revenue, followed by a recommendation on which campaigns to scale and which to restructure based on revenue performance.
Prompt: Email vs other channel revenue comparison
Use Windsor.ai to pull GA4 data for the last 30 days. Break down performance by default channel group and include: - sessions - conversions - purchase revenue - transactions - user conversion rate Include the following channels: - Email - Organic Search - Paid Search - Direct For each channel calculate: - Total sessions - Total purchase revenue - Revenue per session (purchase revenue divided by sessions) - User conversion rate - Email channel share of total sessions as a percentage Identify: 1. Which channel drives the highest revenue per session. 2. Whether email conversion rate is above or below the blended average across all channels. 3. Whether email revenue share is proportional to its session share or whether it is over or underdelivering. Format as a side-by-side comparison table followed by a short strategic recommendation on how to improve email's revenue contribution relative to other channels.
What you’ll get:
A clear picture of exactly how much revenue your email campaigns are generating and how email stacks up against every other channel, so your team can stop optimizing for opens and start optimizing for outcomes that grow the business.
5. Automation and lifecycle email audit
The challenge:
Automations are supposed to work while you sleep. Welcome sequences, abandoned cart flows, and re-engagement series are set up once and left to run. The problem is that most teams never go back to check if they are still working.
A broken automation, a drop-off at step two, or a welcome sequence with a 10% open rate can quietly damage subscriber relationships for months before anyone notices. By the time someone flags it, recovering those subscribers takes far longer than fixing it would have.
Windsor MCP connects your email data to AI, so you can audit every active automation, spot exactly where subscribers are dropping off, and fix the leaks before they cost you more subscribers.
Prompt: Automation performance audit
Use Windsor.ai to pull [Mailchimp / Mailerlite] automation data for the last 30 days. For each automation include: - automation name - status - automation emails count - automation qualified subscribers count - automation stats - automation complete Calculate completion rate. Identify: 1. Automations where completion rate is below 30%. 2. Automations where automation qualified subscriber count is above 100 but open rate in automations stats is below 15%. Flag each issue with a severity level: - High: completion rate between 10% and 30% - Medium: low engagement with qualified subscribers Format as a prioritized issue list followed by one specific fix for each flagged automation.
Prompt: Lifecycle email step analysis
Use Windsor.ai to pull [Mailchimp] automation data for the last 30 days. For each automation include: - automation name - automation steps - automation stats - automation emails count - automation trigger data For each step in automations calculate: - Open rate per step - Drop-off rate (subscribers who received step N but did not receive step N+1) - Overall completion rate (subscribers who completed all steps divided by those who entered) Identify: 1. The step with the highest drop-off rate above 25%. 2. Steps where open rate dropped more than 20% compared to the previous step. 3. Automations where overall completion rate is below 40%. Format as a step-by-step funnel table for each automation, followed by three specific recommendations covering subject line, send delay, and content angle for the weakest steps.
What you’ll get:
A full audit of every active automation with drop-off points and broken flows surfaced instantly, so your team can fix what is leaking and turn your lifecycle emails into a reliable revenue engine.
6. List health and deliverability monitoring
The challenge:
A large email list means nothing if half of it is dead. Inactive subscribers, hard bounces, and spam complaints quietly drag down your sender reputation, and once deliverability takes a hit, even your best campaigns stop reaching the inbox.
Most teams only notice the problem when open rates drop sharply or a campaign gets flagged.
Windsor MCP connects your email list directly to AI, so you can monitor list health continuously, catch deliverability risks early, and keep your sender reputation strong before it becomes a problem.
Prompt: List health audit
Use Windsor.ai to pull [Mailchimp / Mailerlite] subscriber data for the last 30 days. For each subscriber include: - subscriber status - subscriber open rate - subscriber click rate - subscriber sent - subscriber created at - subscriber unsubscribed at Calculate: - Total subscribers by status (active, unsubscribed, bounced) - Percentage of active subscribers with subscriber ent above 5 and open rate = 0 (completely inactive) - Percentage of active subscribers with clicks count = 0 and subscriber sent above 10 Identify: 1. Total inactive subscribers as a percentage of the full list. 2. Subscribers who have been active for more than 30 days but have open rate = 0 and clicks count = 0. 3. Whether the inactive segment grew compared to the previous 30-day period. Format as a list health summary table followed by a three-tier cleaning strategy: subscribers to re-engage, subscribers to sunset with a final campaign, and subscribers to remove immediately.
Prompt: Deliverability risk analysis
Use Windsor.ai to pull [Mailchimp] campaign data for the last 30 days. For each campaign include: - campaign name - campaign started at - campaign stats (bounce rate, open rate, click rate, unsubscribe count, emails sent) Calculate unsubscribe rate as unsubscribe count divided by emails sent for each campaign. Identify: 1. Campaigns where bounce rate exceeded 2%. 2. Campaigns where unsubscribe rate exceeded 0.5%. 3. Whether average open rate across the last 6 campaigns has declined more than 10% compared to the 6 campaigns before that. 4. Whether bounce rate has increased by more than 0.5% over the 30-day period. Flag each issue with a severity level: - Critical: bounce rate above 5% or unsubscribe rate above 1%. - High: bounce rate between 2% and 5% or declining open rate. - Medium: unsubscribe rate between 0.5% and 1%. Format as a prioritized issue list followed by one specific deliverability action for each flagged issue.
What you’ll get:
A clear view of exactly how healthy your list is and where deliverability risks are building, so your team can clean proactively and protect inbox placement before it starts costing you revenue.
7. Email and paid media performance comparison
The challenge:
Email and paid media are rarely evaluated side by side. Paid teams optimize for CPC and ROAS while email teams track open rates and clicks, and nobody ever asks which channel is delivering better returns per dollar invested.
The result is budget decisions made in silos. Paid gets scaled because the spend is visible. Email gets underinvested because its contribution to revenue is harder to quantify without connecting the right data.
Windsor MCP connects your email and Google Ads data to AI, so you can compare both channels on the same metrics and make optimization decisions backed by the full picture.
Prompt: Paid campaign performance and email nurture opportunities
Use Windsor.ai to pull Google Ads data for the last 30 days. For each campaign include: - campaign name - clicks - impressions - cost - conversions - conversion rate - ctr Identify: 1. Top 3 campaigns by conversion rate. 2. Campaigns where clicks exceeded 500 but conversion rate is below 1%, indicating strong interest but weak follow-through. 3. Campaigns where cost per conversion is more than 2x the account average. 4. Campaigns with campaign name containing "brand", "remarketing", or "retargeting". For each campaign identified in points 2 and 3, suggest one specific email nurture sequence that could improve conversion rate, including the trigger, messaging angle, and recommended number of emails. Format as a campaign opportunity table followed by email nurture recommendations for the top 3 opportunities.
What you’ll get:
A clear side-by-side view of how email and paid media compare on conversion efficiency, so your team can identify where paid traffic needs email nurturing and allocate budget where it delivers the strongest results.
8. Churn and unsubscribe analysis
The challenge:
Every unsubscribe is a signal. Someone received your email, decided it was not worth their time, and opted out. One or two is normal. A pattern is a problem that needs attention before it compounds.
Teams glance at unsubscribe counts after each send but rarely analyze the pattern across campaigns. Which campaign types trigger the most churn, which subscriber segments are leaving fastest, and whether churn is accelerating are questions that go unanswered until the list shrinks visibly.
Windsor MCP connects your email performance data directly to AI, so you can spot churn patterns before they become a crisis and understand exactly what is driving subscribers to leave.
Prompt: Unsubscribe pattern analysis
Use Windsor.ai to pull [Mailchimp / Mailerlite] campaign data for the last 30 days. For each campaign include: - campaign name - campaign started at - campaign type - campaign stats (open_rate, click_rate, unsubscribe count, emails sent) Calculate unsubscribe rate as unsubscribe count divided by emails sent for each campaign. Identify: 1. Campaigns where unsubscribe rate exceeded 0.5%. 2. Campaign types (newsletter, promotion, announcement) with the highest average unsubscribe rate. 3. Whether unsubscribe rate is trending up over the 30-day period. 4. Any campaign where unsubscribe rate was more than 2x the account average. For each flagged campaign suggest specific reasons and three corrective actions.
What you’ll get:
A precise breakdown of which campaigns and sources are driving churn, and what your team can do to stop losing subscribers before the damage shows up in your overall list size.
9. Re-engagement campaign analysis
The challenge:
Every email list has a graveyard. Subscribers who signed up months ago, stopped opening, stopped clicking, and are now just dead weight dragging down your engagement rates and deliverability scores.
Teams either ignore them or run a single re-engagement blast with no follow-up analysis. They never find out how many came back, which message worked, or whether the campaign recovered any value from the dormant segment.
Windsor MCP connects your email engagement data directly to AI, so you can identify exactly who needs re-engaging, measure whether your re-engagement campaigns are working, and decide which subscribers to keep and which to remove.
Prompt: Dormant subscriber identification
Use Windsor.ai to pull [Mailchimp / Mailerlite] subscriber data for the last 30 days. For each subscriber include: - subscriber status - subscriber open rate - subscriber click rate - subscriber sent - subscriber subscribed at - subscriber updated at Identify subscribers who meet all of the following conditions: - subscriber status = active - subscriber sent is above 5 - subscriber open rate = 0 - subscribers click rate = 0 Group dormant subscribers by: - How long they have been inactive (30-60 days, 60-90 days, 90+ days) - subscriber source (where they originally signed up) Calculate: - Total dormant subscribers as a percentage of the active list - Which source produces the most dormant subscribers Recommend a re-engagement sequence tailored to each inactivity group with suggested subject lines and send frequency.
What you’ll get:
A clear picture of how large your dormant segment is, where it came from, and ideas for re-engagement campaigns to recover subscribers.
10. Email and CRM pipeline analysis
The challenge:
Email campaigns generate clicks. But whether those clicks turn into leads, opportunities, or closed deals is a question most email teams cannot answer because that data lives in a completely separate system.
Sales teams work inside the CRM. Marketing teams work inside the mailing platform. Neither side has a clear view of how email engagement maps to pipeline activity, which means email strategy gets optimized for opens while the revenue impact stays invisible.
Windsor MCP connects your email marketing and CRM data directly to AI, so you can trace the journey from email click to closed deal, and build a strategy around what is genuinely moving the pipeline.
Prompt: Email engagement to pipeline conversion analysis
Use Windsor.ai to pull [HubSpot] contact and deal data for the last 30 days. From HubSpot contacts include: - contact_lifecyclestage - contact_hs_lead_status - contact_hs_email_open - contact_hs_email_click - contact_hs_email_last_send_date - contact_createdate From HubSpot deals include: - deal_dealname - deal_dealstage - deal_amount - deal_pipeline - deal_createdate Identify: 1. Contacts who opened or clicked an email and progressed to MQL or SQL within 30 days. 2. Average deal amount for contacts who engaged with email vs those who did not. 3. Pipeline stages where email-engaged contacts are most commonly found. 4. Deal stages with the highest drop-off for email-engaged contacts. Recommend five specific email nurture actions to improve conversion from MQL to SQL.
What you’ll get:
A clear view of how email engagement maps to pipeline activity and deal creation, so your team can stop optimizing for clicks in isolation and start sending campaigns that move revenue forward.
11. Subscriber growth analysis
The challenge:
A growing list feels like progress. But raw subscriber count hides the full story. If you are adding 500 new subscribers a month and losing 480, the list is barely moving, and the acquisition cost is being eaten alive by churn.
Teams track total subscriber count without breaking down where growth is coming from, which sources bring in engaged subscribers versus dead weight, and whether net growth is accelerating or quietly stalling.
Windsor MCP connects your email data to AI, so you can see exactly how your list is growing, which acquisition sources deliver the best subscribers, and where to invest to grow faster.
Prompt: Subscriber growth trend analysis
Use Windsor.ai to pull [Mailchimp / Mailerlite] subscriber data for the last 30 days. Group subscribers by month and calculate: - Total new subscribers per month - Total unsubscribes per month - Net growth per month (new minus unsubscribed) - Net growth rate as a percentage of total list size Identify: 1. Whether subscriber net growth is accelerating, flat, or declining over the 90-day period. 2. The month with the highest and lowest net growth. 3. Whether unsubscribe rate is growing faster than new subscriber rate. Finish with three specific recommendations to improve net list growth over the next 30 days.
What you’ll get:
A clear picture of your list growth trends: what’s driving growth, where it’s slowing down, and whether churn is increasing, plus actionable steps to improve net subscriber growth over the next month.
12. Stakeholder reporting
The challenge:
Leadership does not want to know about open rates. They want to know if email is growing the business, how it compares to last month, and what the team is doing about it. Translating email marketing data into that kind of answer manually takes hours every single month.
Email teams spend more time formatting reports than analyzing results.
Windsor MCP streamlines the reporting process by connecting your email data to AI, so your team can generate a complete, insight-driven stakeholder report in minutes. Walk into every review with a clear story backed by fresh data.
Prompt: Monthly email performance report
Use Windsor.ai to pull [Mailchimp / Mailerlite] campaign and subscriber data for the last 30 days compared to the previous 30 days. From campaign data include: - campaign name - campaign started at - campaign type - campaign stats (open rate, click rate, bounce rate, unsubscribe count, emails sent) From subscriber data include: - subscriber status - subscriber subscribed at - subscriber unsubscribed at Calculate for the current period vs previous period: - Total campaigns sent - Average open rate and change vs previous period - Average click rate and change vs previous period - Net subscriber growth (new minus unsubscribed) - Total unsubscribe rate Structure the report as follows: 1. Executive summary (3 sentences maximum) 2. Key metrics table with period over period changes 3. Top 3 performing campaigns with supporting data 4. Top issues or declines with supporting data 5. Three specific recommended actions for next month Write in plain language suitable for a CEO or client who does not work in email marketing day to day.
What you’ll get:
A polished, insight-driven report that tells the story behind the numbers without requiring hours of manual assembly, so your team walks into every stakeholder meeting prepared and focused on strategy.
Pro tips to level up your email marketing with AI
These practical tips help you turn Windsor MCP into a repeatable system for email analysis, reporting, and performance optimization.
1. Always specify your mailing platform and date range in every prompt
Windsor supports multiple connected data sources, which means a prompt without a specified account can pull from the wrong place. Always name your platform and include the exact account name and date range in every prompt to keep your analysis accurate and focused.
"Use Windsor.ai to pull [Mailchimp] data for [account name] for [the last 30 days compared to the previous 30 days]..."
2. Use one data source per prompt unless cross-channel analysis is the goal
The more data sources and conditions you stack into a single prompt, the slower the AI works and the higher the chance of an error or incomplete output. Keep single-channel analysis prompts clean with one data source. Reserve multi-source prompts for use cases that genuinely require cross-channel comparison.
3. Separate subscriber status in every audience analysis
Active, unsubscribed, and bounced subscribers behave completely differently. Mixing them into a single audience analysis will skew every metric. Consider filtering by ‘subscriber status = active’ when analyzing engagement, and run a separate prompt when analyzing churn or list health.
"Filter for subscribers where subscribers__status = 'active' and pull open_rate, click_rate, and subscribed_at for the last 30 days..."
4. Ask AI to format output for your specific use case
Windsor MCP and AI tools can produce output in whatever format your workflow requires. Add formatting instructions at the end of any prompt to save time on post-processing.
"...Format the output as: - A summary table with campaign name, open_rate, click_rate, and unsubscribe_rate - Followed by a 3-bullet executive summary - Followed by 3 recommended actions with the data point that supports each one - Visualize stats in the report dashboard (if you use Claude)"
5. Use consistent naming conventions
If campaign names, segments, or tags are messy, AI analysis gets messy too.
Consider using specific naming like:
promo_black_friday_2025newsletter_weekly_jan_w1
Then reference those patterns in prompts.
Conclusion
Email is one of the highest-ROI channels a business can invest in. But that return is impossible to prove, protect, or grow when performance data is scattered across platforms with no unified view.
Windsor MCP gives email marketing teams a single bridge between their data and the deep AI answers they need. Campaign performance, deliverability, automations, segmentation, revenue attribution, and stakeholder reports all become accessible in seconds instead of hours.
Start with one use case, run one prompt, and compare it to what your current process looks like. The time you save is time your team can put back into the work that improves results and grows the list.
🚀 Start your 30-day free trial at Windsor.ai and connect your first data source to AI tools in under a minute: https://onboard.windsor.ai/.
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