On 10/16/24 13:52, Mark Sapiro wrote:
On 10/14/24 12:42, Greg Newby via Mailman-users wrote:
Here are the corresponding logfile entries from mailmanweb.log:
smtplib.SMTPRecipientsRefused: {'redac...@gmail.com': (504, b'5.5.2
<mail>:
Helo command rejected: need fully-qualified hostname')}
and from mail.log:
Oct 14 12:06:26 domain postfix/smtpd[722764]: NOQUEUE: reject: RCPT from
localhost[127.0.0.1]: 504 5.5.2 <mail>: Helo command rejected: need
fully-qualified hostname; from=<r...@lists.domain.tld>
to=<root@localhost>
proto=ESMTP helo=<mail>
lists.domain.tld is the domain for Mailman3. I don't know why it's
trying
to send email from root@.
I think the mail.log entry is for the DSN for the failure. The issue
is the HELO/EHLO command. Try the following in your venv
```
(venv) ...:~$ python
Python 3...
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> socket.getfqdn()
```
If that returns `localhost`, that's the issue. I think you can fix it
by putting a fully qualified domain name in /etc/hostname.
This is actually a postfix misconfiguration. By default, Postfix uses
the `myhostname` variable to define your HELO/EHLO.
In your /etc/postfix/main.cf change your `myhostname` to be an FQDN. If
your mail server's FQDN is actually mail.example.com on the rDNS and
forward DNS side, then set this in /etc/postfix/main.cf:
myhostname = mail.example.com
Then restart your Postfix. That will solve your issue.
Thomas
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