Dovecot doesn't find mailboxes containing plus sign

Asked Jun 18 '19 at 09:10

Active Jun 18 '19 at 14:26

Viewed 262 times

I'm running a Postfix/Dovecot setup and some of my users use + signs in their addresses (not using the postfix recipient_delimiter). It's not possible to send emails to them, because the mailboxes are not known:

postfix/pipe[15853]: 6C4B4110F01: to=<plussignemailaddress>, relay=dovecot, delay=0.02, delays=0/0/0/0.01, dsn=5.1.1, status=bounced (user unknown)

dovecot seems to be the problem:

> doveadm user plussignemailaddress  
> userdb lookup: user plussignemailaddress doesn't exist

The mailbox does exist, though. How do I fix this?

The recipient delimiter isn't active:

#recipient_delimiter = +

edited Jun 18 '19 at 14:26

asked Jun 18 '19 at 09:10

thpetrus

Possible duplicate of [Dovecot - plus sign in mailbox name](https://serverfault.com/questions/748182/dovecot-plus-sign-in-mailbox-name) – Romeo Ninov Jun 18 '19 at 13:43
No, the ``recipient_delimiter`` is commented out in Postfix. – thpetrus Jun 18 '19 at 14:27
Do you have your accounts in format `+text@domain.tld`? If yes, please read RFC about mails. – Romeo Ninov Jun 18 '19 at 14:30
Some users use this format, yes. RFC states that the plus sign is valid as an address. – thpetrus Jun 19 '19 at 10:39
Right, but AFAIK not on the begin of the username – Romeo Ninov Jun 19 '19 at 10:57
I get your point, the plus isn't the lead character on the problematic mailboxes, though. – thpetrus Jun 19 '19 at 11:23

Dovecot doesn't find mailboxes containing plus sign

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