Hi list, I set up dovecot as IMAP proxy using a master user to login into the backend and it works beautifully. ?? Next I set out to do LMTP proxying and I struggled (initially). I got the log message: Mar 17 11:23:44 mail postfix/lmtp[2665]: 99A3F219C8: to=<johnny at doe.com>, relay=10.15.1.2[10.15.1.2]:24, delay=5.1, delays=4.9/0.05/0.01/0.07, dsn=5.1.1, status=bounced (host 10.15.1.2[10.15.1.2] said: 550 5.1.1 <"johnny at doe.com*director"@mail.server.com> User doesn't exist: "johnny at doe.com*director"@mail.server.com (in reply to RCPT TO command)) My director's passdb setting looked like this: passdb { driver = sql args = /etc/dovecot/sql/my-passdb.conf result_success = continue-ok result_failure = return-fail result_internalfail = return-fail } # Add director master user credentials if above succeeded passdb { driver = static args = proxy=y starttls=any-cert \ destuser=%u*director at example.com \ pass=correcthorsebatterystaple \ nopassword=y skip = unauthenticated } In the end I found that setting the `master` field instead of `destuser` solves the issue. It looks like LMTP does not know how to handle the master user separator although set. I this known/wanted behavior? Maybe this is something to mention on the wiki page, it took a while to figure this out... Kind regards, Dirk Mit freundlichen Gr??en Dirk Weise DevOps Engineer -- bitloft GmbH | Schulstra?e 2 | D-42551 Velbert www.bitloft.de | weise at bitloft.de Telefon: +49 2051 40514-32 Gesch?ftsf?hrer: Robin Clemens, Franz-Josef Wieneke Amtsgericht Wuppertal HRB 17297 | USt-IDNr. DE121540053 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20190317/4cc0e8e8/attachment.html>