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stalwartlabs / mail-server

Secure & Modern All-in-One Mail Server (IMAP, JMAP, POP3, SMTP)
https://stalw.art
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[enhancement]: Avoid sending reports for DMARC/delivery reports #173

Closed ghagl closed 2 days ago

ghagl commented 6 months ago

Which feature or improvement would you like to request?

An option to avoid sending reports for received dmarc or delivery reports.

Is your feature request related to a problem?

I have DMARC with reports enabled (to postmaster@) and it seems that it leads to a feedback loop, meaning that my server receives a DMARC report that leads to my server then submitting a DMARC report, and so it continues in an infinite loop. For now I have reduced the frequency of DMARC aggregate reports in Stalwart's settings.

Code of Conduct

Avamander commented 6 months ago

I suspect you are not sending the reports from a subdomain that has reporting disabled. Looking at my own dataset, detecting such a loop is unlikely to be trivial. Meaning it would be much better to change configuration to avoid this.

This same thing has happened with other software, such as rspamd: https://github.com/rspamd/rspamd/issues/4095

ghagl commented 4 months ago

For now I use report-uri.com and this loop disappeared then. Probably looking to migrate reporting to a non-reporting subdomain sometime soon