Automated Mailgun Suppression List Reconciliation
Every Monday, WebRun opens Mailgun, pulls the week's bounce, complaint, and unsubscribe events across your sending domains, reconciles them into a master suppression list archived in Google Drive, and posts a Slack summary of new suppressions and any domain issues.
How do I keep a Mailgun suppression list reconciled and current?
WebRun pulls your Mailgun bounce, complaint, and unsubscribe events every Monday, reconciles them into one master suppression list archived in Google Drive, and posts a Slack summary of what changed. That keeps every sending domain's suppression record current and gives the team an early flag on any domain with a rising bounce rate.
- The suppression list stays current without anyone exporting CSVs by hand
- A rising bounce rate on any sending domain gets flagged the same week
- Every suppression event is archived with a date, not lost in the Mailgun dashboard
Built for developers · email infrastructure teams · marketing ops · SaaS platforms
What does WebRun do on every run?
The exact actions WebRun takes, in order - in plain language, so you can adjust anything.
-
WebRun signs in and gets to work
Opens
app.mailgun.comin a real browser with your saved login - no setup, no API keys. -
1
Mailgun - pull bounce and complaint events
mailgun.com
WebRun opens Mailgun to pull bounce and complaint events. - Open Mailgun and pull this week's bounces, complaints, and unsubscribes across sending domains
- Note which domain and address list each event belongs to
- Check each sending domain's delivery stats for anything unusual
Done when Every suppression event from the week has been pulled with its domain.
-
2
Google Drive - archive the master suppression list
drive.google.com
WebRun opens Google Drive to archive the master suppression list. - Open the master suppression file in Google Drive
- Add this week's new bounces, complaints, and unsubscribes without duplicating existing entries
- Archive a dated copy so history is never lost
Done when The master suppression list in Drive reflects every event from the week.
-
3
Slack - summarize what changed
slack.com
WebRun opens Slack to summarize what changed. - Post a summary of how many addresses were newly suppressed this week
- Flag any sending domain whose bounce rate looks off
- Link to the updated file in Drive
Done when The team has this week's suppression summary in Slack.
How is each run configured?
Secure by default
Connect once, stays signed in
WebRun signs in once and keeps each session in a persistent environment, so every run picks up right where it left off.
Every action is checked against this policy before it runs.
Questions, answered
Does it send any email or change my sending domains?
No. WebRun only reads events and updates the suppression file it maintains in Drive. It never sends mail or edits your Mailgun domain settings.
How does it avoid double-counting the same bounce?
It checks the existing master list before adding a row, so an address already recorded as suppressed is not logged twice.
What if a sending domain has a real deliverability problem?
It flags an unusual bounce rate in the Slack summary so someone can investigate, but the fix itself is left to your team.
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