Facebook
Twitter
enerspace
Basic Pleskian
- Server operating system version
- Almalinux 8.10
- Plesk version and microupdate number
- 18.0.69
Hi everyone,
I’ve encountered a strange behavior on one of my mail servers and I’m wondering if anyone else has experienced something similar – or if this might actually be a bug.
When I send an email from an existing account (e.g. [email protected]) to a non-existent mailbox on a third-party server, I should receive a bounce email from MAILER-DAEMON. However, this bounce message ends up in the spam folder.
/etc/psa/dmarc.conf:
Here you can clearly see that DMARC is being applied even to locally generated messages – even though IgnoreMailFrom is configured. As a result, the bounce message is marked as suspicious and lands in the spam folder.
…the behavior changes. DMARC checks appear to be skipped for locally delivered bounce emails, and the header looks like this
Is it intended behavior for DMARC to also apply to system-internal messages like bounces? Or am I missing a setting here? The fact that IgnoreMailFrom seems to be ignored feels wrong to me.
Thanks!
I’ve encountered a strange behavior on one of my mail servers and I’m wondering if anyone else has experienced something similar – or if this might actually be a bug.
When I send an email from an existing account (e.g. [email protected]) to a non-existent mailbox on a third-party server, I should receive a bounce email from MAILER-DAEMON. However, this bounce message ends up in the spam folder.
My configuration:
DMARC record (DNS):v=DMARC1; p=quarantine; adkim=s; aspf=s/etc/psa/dmarc.conf:
IgnoreMailFrom example.mydomain.com, ...Header of the bounce message (before adjustment):
Code:
Authentication-Results: example.mydomain.com; dmarc=fail (p=QUARANTINE sp=NONE) smtp.from= header.from=example.mydomain.com
Return-Path: <MAILER-DAEMON>
From: [email protected]
Subject: Undelivered Mail Returned to SenderHere you can clearly see that DMARC is being applied even to locally generated messages – even though IgnoreMailFrom is configured. As a result, the bounce message is marked as suspicious and lands in the spam folder.
However, when I run the following command:
Code:
plesk bin settings -s mail_dmarc_reject_at_smtp=false && plesk repair mail -y…the behavior changes. DMARC checks appear to be skipped for locally delivered bounce emails, and the header looks like this
Header of the bounce message (after adjustment):
Code:
X-Spam-Status: No, score=-0.0 required=7.0 ...
Return-Path: <MAILER-DAEMON>
From: [email protected]
Subject: Undelivered Mail Returned to Sender
...Is it intended behavior for DMARC to also apply to system-internal messages like bounces? Or am I missing a setting here? The fact that IgnoreMailFrom seems to be ignored feels wrong to me.
Thanks!