[Dovecot] Internal login failure

[David Andel]

Hi all

My postfix/dovecot installation seems to be working fine - on the
machine. But I cannot connect from the outside by IMAP.

I am desperately searching for the reason of the following error:

bit:/var/log# telnet localhost imap
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK Dovecot ready.
1 LOGIN test test1
* BYE Internal login failure. Refer to server log for more information.
Connection closed by foreign host.

The PW sould be correct:

bit:/etc/dovecot# grep ^test passwd
test:{PLAIN}test1

/var/log/dovecot-info.log sais (I have removed the last block in the IP):

ovecot: Apr 22 04:27:05 Info: auth(default): client in: AUTH	1	PLAIN
service=IMAP	lip=217.150.250.xxx	rip=127.0.0.1	resp=AHRlc3QAdGVzdDE=
dovecot: Apr 22 04:27:05 Info: auth(default): client out: OK	1	user=test
dovecot: Apr 22 04:27:05 Info: auth(default): master in: REQUEST	4	4739	1
dovecot: Apr 22 04:27:05 Info: auth(default): master out: USER	4	test
uid=111	gid=8	home=/srv/vmail//test
dovecot: Apr 22 04:27:05 Info: imap-login: Internal login failure:
user=<test>, method=PLAIN, rip=127.0.0.1, lip=217.150.250.xxx


Any ideas what this could be caused by?

Thank you in advance and best regards,
David