four mails in queue, can't be send

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#1 Sun, 06/10/2018 - 17:18
NDDT

four mails in queue, can't be send

Hi,

I have four mails in my queue that can't be send. Two diffrent error-messages.

The first one says:

Helo command rejected: Host not found (in reply to RCPT TO command)

This is what I find in the log for the same mail:

dane configured with dnssec lookups disabled

The second one says:

HELO fqdn needs a public DNS record OX_202

The log says pretty much the same:

*** refused to talk to me: 421 4.2.1 HELO fqdn needs a public DNS record OX_202

I changed my hostname and created the DNS Record.

Sun, 06/10/2018 - 22:23
andreychek

Howdy,

Hmm, it sounds like the hostname being sent during the "HELO" phase of the email delivery is using a name some of the remote servers don't like.

What output do you see if you run these commands:

hostname
hostname -f
cat /etc/mailname
postconf -n

Note that if Postfix is using your system hostname, you may also need to restart Postfix after changing the hostname.

-Eric

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