Postfix user at domain splitting

Ricardo Branco ricardo at
Tue Jul 15 17:23:54 UTC 2014

That was done for testing to see if it made any difference when I moved to LDA, in LDA mode it seems to not care if that 
is %n or %u, it always takes the first part of the email address which is weird.
Ive just tested again to confirm on %n and its not working so ive reverted again back to LDA which does. Seems to not 
matter how that variable is set it does not do anything.

When using %n ive tried to see if I can login via IMAP with the whole username but again no, this is the error, note the 
difference between the 'user' field on each line.

Jul 15 18:22:17 imap-login: Info: Login: user=<mark.whittaker>, method=PLAIN, rip=, lip=, 
mpid=9493, session=<VVE8pj7+9wAKAAC0>
Jul 15 18:22:20 imap-login: Info: Disconnected: Shutting down (auth failed, 4 attempts in 37 secs): 
user=<mark.whittaker at>, method=PLAIN, rip=, lip=, TLS, session=<Vjs9pD7+IgAKAAAD>

Steffen Kaiser wrote, On 15/07/2014 13:18:
> Hash: SHA1
> On Tue, 15 Jul 2014, Ricardo Branco wrote:
>> Attached files
>> Nick Edwards wrote, On 15/07/2014 10:19:
>>> you need to show doveconf -n
>>> and what you have in the master.conf for dovecot
>>> On 7/15/14, Ricardo Branco <ricardo at> wrote:
>>>> I have been trying looking though all the wiki documents to setup LMTP.
>>>> It now seems to all be connected except that it keeps saying that the
>>>> user is not recognised when postfix sends to LMTP, it sends the full
>>>> recipent email address but seems that on the dovecot side it is unable
>>>> to work with this.
>>>> I have checked the userdb and made sure its using %n but alas it still
>>>> does not work.
> userdb {
>   args = username_format=%u /etc/passwd
>   driver = passwd-file
>   name = passwd-file
> }
> In opposite to your sentence I see a %u there.
>>>> Currently ive had to revert to using LDA as it works fine with that but
>>>> i still dont know how as the postfix config variable $RECIPIENT is the
>>>> full email address and does not seem to matter to LDA.
> - -- Steffen Kaiser
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