Postfix removing domain from user names before passing to Dovecot for IMAP authentication

Posted by chernevik on Server Fault See other posts from Server Fault or by chernevik
Published on 2010-05-11T16:26:38Z Indexed on 2010/05/11 16:34 UTC
Read the original article Hit count: 273

Filed under:

postfix

|

imap

|

dovecot

In IMAP authentication with Dovecot, Postfix is stripping the domain name from virtual users who share a name with a local user, causing them to fail authentication. Virtual users without local accounts don't have this problem.

How can I prevent this? Failing an answer, how can I debug Postfix to see what's going on? I've turned on every debugging option I can get, and I'm not seeing anything helpful in the logs.

© Server Fault or respective owner

Related posts about postfix

postfix: Temporary lookup failure

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to:… >>> More
postfix with mailman

as seen on Server Fault - Search for 'Server Fault'
What should happen is that [email protected] should be delivered to that users inbox on localhost, user@localhost. Thunderbird works fine at reading user@localhost. I'm just using a small portion of postfix-dovecot with Ubuntu mailman. How can I get postfix to recognize the FQDN and deliver… >>> More
saslauthd + PostFix producing password verification and authentication errors

as seen on Server Fault - Search for 'Server Fault'
So I'm trying to setup PostFix while using SASL (Cyrus variety preferred, I was using dovecot earlier but I'm switching from dovecot to courier so I want to use cyrus instead of dovecot) but I seem to be having issues. Here are the errors I'm receiving: ==> mail.log <== Aug 10 05:11:49 crazyinsanoman… >>> More
centos postfix send email problem

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a big problem with postfix. I can receive mail in webmin and outlook but I can't send (only on local I can - user to user). Dovecot is working just fine. Sendmail is disable. Please help me. postfix -n postfix: invalid option -- n postfix: fatal: usage: postfix [-c config_dir] [-Dv]… >>> More
Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend

as seen on Server Fault - Search for 'Server Fault'
So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as… >>> More

Related posts about imap

Why won't fetchmail work all of a sudden?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I ran a chmod 777 * on my home folder. (I know, I know. I'll never do it again.) Ever since then, fetchmail seems to be broken. I use it to fetch mail from an Exchange 2003 mailbox through DAVMail and OWA. The problem is that fetchmail complains about an "expunge mismatch" whenever I get a new… >>> More
Backup IMAP mail, then access via IMAP again

as seen on Super User - Search for 'Super User'
I am looking for a tool to backup an entire IMAP account and then expose that backup (read-only) via IMAP again. This would be perfect for backing up email from any provider, and allowing the backup to be accessed from any mail client even years after closing the account. I suspect this could be… >>> More
php imap get connection failed error

as seen on Stack Overflow - Search for 'Stack Overflow'
Warning: imap_open() [function.imap-open]: Couldn't open stream {imap.gmail.com:993/imap/ssl}INBOX in /home/happy/public_html/source/imap/fet_mail_from_email_add.php on line 7 can't connect: Can't connect to gmail-imap.l.google.com,993: Connection timed out my snippet is $mbox = imap_open("{imap… >>> More
wildcard ssl certificate - exchange 2010 - POP/IMAP problem

as seen on Server Fault - Search for 'Server Fault'
previously we have requested a wildcard ssl certificate from godaddy for our major domain. one of the reasons was the new established exchange server 2010. usually you require following names included in certificiate: FQDN (e.g. mail.whatever.com) Hostname (mail) Domain name (whatever.com) Autodiscover… >>> More
Backup Gmail using Mail.app and IMAP without redundancy

as seen on Super User - Search for 'Super User'
I don't care for actually using mail app, I use mostly the gmail interface and mail app just for offline, for quickly reading and eventually replying. Everything is working fine, I think I've followed every guide out there... Here's a great one. But I could find nothing about avoiding redundancy… >>> More