[Dovecot] When should dictionary entries for the expire plugin be added/updated?

[Timo Sirainen]

On Wed, 2010-08-25 at 18:42 +0200, Ralph Seichter wrote:

>   postfix/lmtp[20701]: 2C59018E0E8: to=<user at server.domain.tld>,
>   relay=server.domain.tld[private/dovecot-lmtp], delay=0.04,
>   delays=0.02/0/0/0.01, dsn=5.1.1, status=bounced (host
>   server.domain.tld[private/dovecot-lmtp] said: 550 5.1.1
>   <user at server.domain.tld> User doesn't exist: user at server.domain.tld
>   (in reply to RCPT TO command))
> 
> What would be required to make Dovecot store mail for user at server.domain.tld
> in /home/user/.maildir?

So you want to drop the domain? I'm not sure if you can do this on
Postfix's side, but you can at least enable it globally to Dovecot (also
means for imap/pop3 logins users can start to use user at whatever):

auth_username_format = %Ln