Hi,

in seldom cirumstances it's possible that the imap-process is crashing without write something usefule into the logfile.

a) User foo exists, is happy and everything's alright

b) He had a shared folder given from bar

c) In our setup we have mailforwarding adresses without a valid $home in LDAP

c) if user bar is changed from a user with into a mailforwarding adress, the user foo won't have an entry for $home any more, but still exists in LDAP.

d) If foo logs in, dovecot's exploring the shared folders given from the non-existing user bar. But bar's entry in LDAP doesn't have $home any more. imap crashes and closes the TCP-connection immediately.

root@dobby2:/etc/dovecot# telnet xxxxxxxx 143 Escape character is '^]'.

• OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE ACL UIDPLUS STARTTLS AUTH=PLAIN AUTH=LOGIN AUTH=CRAM-MD5 AUTH=DIGEST-MD5] Dovecot ready. Testing. a LOGIN foo xxxxx a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS ACL UIDPLUS QUOTA ACL RIGHTS=texk] Logged in a LIST "" "*"
• BYE Internal error occurred. Refer to server log for more information. Connection closed by foreign host.

Dec 22 21:57:41 dobby2 dovecot: master: Error: service(imap): child 18095 killed with signal 11 (core dumps disabled)

e) This happens if mail_location=mdbox:%%h/mdbox is set in the shared folder namespace. If I set "mail_location=auto:" then Dovecot logs an error message, but is still possible to continue without any problems.

Dec 22 21:33:59 dobby2 dovecot: imap(bar): Error: Namespace 'shared/bar/': Autodetection failed for auto: (home=/mail/foo/)

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