[Dovecot] Postfix + LMTP with virtual users: how to strip domain from LMTP RCPT TO

[Mildred Ki'Lya]

Hi,

I am trying to set up my own mail server (to get off Google) and I have a
problem with mail delivery. I'm using Postfix as a SMTP front-end, and use
the LMTP server included in dovecot to receive mail from postfix.

I have a setup which works with the dovecot LDA, it involves calling
dovecot-lda with the -d flag. Postfix computes the username by removing
what's after the recipient_delimiter and the domain from the mail address,
and gives this username to dovecot.

But, I'd prefer using LMTP, as it is possible to reject unknown e-mails
without having to duplicate the user database (it is explained here:
http://wiki2.dovecot.org/LDA/Postfix )

I set up LMTP so that postfix uses the socket provided by dovecot, and it
works. Only I get the following error message in the logs:

Feb 10 18:05:53 ashley postfix/smtpd[9298]: NOQUEUE: reject: RCPT from
mail-wi0-f179.google.com[209.85.212.179]: 450 4.1.1 <mildred at mildred.fr>:
Recipient address rejected: unverified address: host
mail.mildred.fr[private/dovecot-lmtp]
said: 550 5.1.1 <mildred at mildred.fr> User doesn't exist:
mildred at mildred.fr(in reply to RCPT TO command); from=<
shanti at sogilis.com> to=<mildred at mildred.fr> proto=ESMTP helo=<
mail-wi0-f179.google.com>
Feb 10 18:06:52 ashley postfix/smtpd[9298]: NOQUEUE: reject: RCPT from
mail-wi0-f179.google.com[209.85.212.179]: 450 4.1.1 <mildred-test at mildred.fr>:
Recipient address rejected: unverified address: host
mail.mildred.fr[private/dovecot-lmtp]
said: 550 5.1.1 <mildred-test at mildred.fr> User doesn't exist:
mildred-test at mildred.fr (in reply to RCPT TO command); from=<
shanti at sogilis.com> to=<mildred-test at mildred.fr> proto=ESMTP helo=<
mail-wi0-f179.google.com>


I followed the explanations here:
http://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP

The problem is that my passwd-like file only contains a user named
"mildred". I tried to add a user mildred at mildred.fr and
mildred%mildred.frbut it doesn't work either.

Do you know how I could tell dovecot to guess the username correctly ?

Thanks,

Mildred

-- 
Mildred Ki'Lya
http://mildred.fr