Can't send mail with mail-client

yakuraku1 · Post by **yakuraku1** » Sat Aug 01, 2020 6:26 pm

Hello,

after a restructure of my network infrastructure I have troubles sending of email with my E-Mail Client (Mail of Apple).
I changed the MTA Trusted Network IPs to match the new ip addresses. I even added the subnet of the network in which the Mac (macbook.hostname) is.

On the admin e-mail I get this transcript:

Code: Select all

Transcript of session follows.

Out: 220 zimbra.hostname ESMTP Postfix
In:  EHLO macbook.hostname
Out: 250-zimbra.hostname
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In:  STARTTLS
Out: 220 2.0.0 Ready to start TLS
In:  EHLO macbook.hostname
Out: 250-zimbra.hostname
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-AUTH LOGIN PLAIN
Out: 250-AUTH=LOGIN PLAIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In:  AUTH PLAIN
   LONGSTRING=
Out: 235 2.7.0 Authentication successful
In:  MAIL FROM:<my@email.address>
Out: 451 4.3.0 Temporary lookup error
In:  QUIT
Out: 221 2.0.0 Bye

In the logfile I find this:

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NOQUEUE: reject: MAIL from unknown[192.168.XX.XX]: 451 4.3.0 Temporary lookup error; proto=ESMTP helo=<macbook.hostname>

But this IP is in the MTA Trusted Network included (by subnet).

Does anyone has an idea what to change to make it work?