Duplicate emails in custom folder after upgrade to 2024-11b when using SOGo filter rules with alias
Description:
After upgrading to mailcow version 2024-11b, I encountered an issue with duplicate emails when using SOGo filter rules with mailcow alias setup. This behavior didn’t occur in previous versions.
Current Setup:
- Mailcow version: 2024-11b (recently upgraded)
- Created an alias: grouptest@example.com -> test@example.com
- Created a SOGo filter rule: if To/Cc contains “grouptest@example.com” then move to “grouptest” folder
Issue Description:
Without filter rule:
- When sending an email to both grouptest@example.com and test@example.com
- Only one email appears in the inbox (SOGo automatically deduplicates)
With filter rule:
- Same email sent to both addresses
- Two identical emails appear in the “grouptest” folder
- Both emails have:
- Same Message-ID
- Different X-Original-To headers (one for each address)
Important Note:
- This issue started occurring after upgrading to version 2024-11b
- Previous versions handled this scenario correctly with only one email appearing in the custom folder
Expected Behavior:
- Only one email should appear in the custom folder, just like in the inbox
- Should work the same way as it did in previous versions
Question:
- Is this a known issue with the new version?
- Is there a way to prevent duplicates in custom folders while maintaining the filter rule?
- Are there any configuration changes needed after the upgrade?