I see this in the watchdog log; two handfull ig lines like this, then postfix is restarted.

SMTP WARNING - Invalid response ‘554 5.7.1 <mailcowdockerized_watchdog-mailcow_1.mailcowdockerized_mailcow-network[172.22.1.5]>: Client host rejected: Access denied’ to command ‘RCPT TO:watchdog@localhost’

In postfix log I see this, dunno if it’s related.
postfix/trivial-rewrite[390]: warning: do not list domain localhost in BOTH mydestination and virtual_mailbox_domains

  • diekuh

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  • Post #2

You changed the extra.cf or main.cf and forgot to add the mailcow-internal network in mynetworks.

Furthermore mydestination == virtual_mailbox_domains should never be possible. Except for when, well, you change the extra.cf/main.cf with wrong values.

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I have
mydestination = localhost.localdomain, localhost
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 [fe80::]/10 10.0.5.0/24
virtual_mailbox_domains = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_domains_maps.cf

I now removed localhost both in mydestination and as a domain alias.
I added the 172.22.1.0/24 to mynetworks

I still get SMTP WARNING - Invalid response '550 5.1.1 <watchdog@localhost>: Recipient address rejected: User unknown in virtual mailbox table' to command 'RCPT TO:watchdog@localhost'
CRITICAL - Socket timeout

and watchdog kills and restarts postfix

  • diekuh

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  • Post #5

Why did you add these changes? They break your setup, that’s expected.

For the 10.0.5.0/24 network check the docs please. Search for “unauthenticated relaying”.

    diekuh Why did you add these changes? They break your setup, that’s expected.
    I may be stupid, but what should I then have? Remove localhost.localdomain too?

    For the 10.0.5.0/24 network check the docs please. Search for “unauthenticated relaying”.
    I want relay from my hosts in that network. Those are physical hosts (well, vmware), that are natted to world addresses later.

      • diekuh

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      • Post #8

      So in your case you would only add mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 [fe80::]/10 172.22.1.0/24 [fd4d:6169:6c63:6f77::]/64 10.0.5.0/24

      so mydestination = [empty]?

      Nope. Still
      `
      Sat Oct 2 12:40:05 UTC 2021 Postfix health level: 0% (0/8), health trend: -2
      Sat Oct 2 12:40:06 UTC 2021 Postfix hit error limit

      SMTP WARNING - Invalid response ‘550 5.1.1 <watchdog@localhost>: Recipient address rejected: User unknown in virtual mailbox table’ to command ‘RCPT TO:watchdog@localhost’
      CRITICAL - Socket timeout
      SMTP OK - 0.018 sec. response time|time=0.017618s;;;0.000000
      `

      7 months later

      Can we start this again?
      tried by hand:

      rcpt to: watchdog@localhost
      550 5.1.1 <watchdog@localhost>: Recipient address rejected: User unknown in virtual mailbox table

      No one is typing