Guy,

Thanks for your reply.

In /usr/local/mailman/data/virtual-mailman I have entries like:

te...@example.com              test9
test9-ad...@example.com        test9-admin

and in /usr/local/mailman/data/aliases I have entries like:

test9:             "|/usr/local/mailman/mail/mailman post test9"
test9-admin:       "|/usr/local/mailman/mail/mailman admin test9"

I believe I'm pointing to both those files with virtual_alias_maps and alias_maps as quoted below.

Thanks,

Sean

On 12 May 2025, at 20:05, Guy B. Purcell wrote:

Do you actually have the alias for testl...@example.com in either of your aliases files (most probably should be /usr/local/mailman/data/aliases)? The only way postfix will know what to do with that address is via an alias directing it to call a MM function that posts the message to the list. Despite my better judgement, I’m still on v2 & such an entry looks like:

testlist: “|/path_to_mailman/mail/mailman post testlist”

Been *many* years, but IIRC the docs note how to set those up properly & it was a manual process (but once you have the set for one list, copy/pasta + a little search/replace will get you the rest).

-Guy


On 2025 May 12, at 10:08, Sean McBride <s...@rogue-research.com> wrote:

Hi all,

So I have/had a working postfix+dovecot setup, and then I installed mailman2.

It largely works. The web interface works, I can create lists, list creation emails are sent to the admin (me), but trying to write to a list (as a member) fails with a bounce. My maillog shows:

```
May 12 12:19:48 hostname postfix/lmtp[83792]: ED07A32156: to=<testl...@example.com>, relay=mx.example.com[private/dovecot-lmtp], delay=0.6, delays=0.59/0/0/0.01, dsn=5.1.1, status=bounced (host mx.example.com[private/dovecot-lmtp] said: 550 5.1.1 <testl...@example.com> User doesn't exist: testl...@example.com (in reply to RCPT TO command))
```

Indeed I wouldn't expect dovecot to know any such user, so I'm not sure what step I've missed...

In my postfix main.cf I have:

```
mydomain = example.com
myhostname = mx.example.com
mydestination = $myhostname localhost.$mydomain localhost
myorigin = $mydomain
virtual_alias_maps = hash:/usr/local/etc/postfix/virtual-aliases, hash:/usr/local/mailman/data/virtual-mailman
alias_maps = hash:/etc/aliases, hash:/usr/local/mailman/data/aliases
```

In my mm_cfg.py I have:


```
MTA = "Postfix"
POSTFIX_STYLE_VIRTUAL_DOMAINS = ['example.com']
DEFAULT_EMAIL_HOST = 'example.com'
DEFAULT_URL_HOST = 'mailman.example.com'
VIRTUAL_HOSTS.clear()
add_virtualhost(DEFAULT_URL_HOST, DEFAULT_EMAIL_HOST)
```

Any clues would be greatly appreciated.

Thanks,

Sean
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