I have certain power users who can't login through POP3 or IMAP from their computer while being receiving mail on their cell phones (pop3), despite pop3_lock_session = no Am I hitting some other limit? I don't see any error in dovecot.log but a generic failed login: Oct 21 10:31:44 imap-login: Info: Disconnected (auth failed, 1 attempts in 2 secs): user=<someuser at somedomain.com>, method=DIGEST-MD5, rip=::1, lip=::1, secured, session=<XSVQLSqy2IYAAAAAAAAAAAAAAAAAAAAB> Running version is 2.3.11.3
> On 21/10/2020 12:58 jesus san miguel <jesus.sanmiguel at gmail.com> wrote: > > > I have certain power users who can't login through POP3 or IMAP from > their computer while being receiving mail on their cell phones (pop3), > despite pop3_lock_session = no > > Am I hitting some other limit? I don't see any error in dovecot.log > but a generic failed login: > > Oct 21 10:31:44 imap-login: Info: Disconnected (auth failed, 1 > attempts in 2 secs): user=<someuser at somedomain.com>, > method=DIGEST-MD5, rip=::1, lip=::1, secured, > session=<XSVQLSqy2IYAAAAAAAAAAAAAAAAAAAAB> > > Running version is 2.3.11.3Do you support DIGEST-MD5 logins? If yes, then they have wrong password. Aki
Yes, we support DIGEST-MD5, but the password is correct: If I restart the service, they can login immediately. [root at hermes dovecot]# grep md5 * grep: conf.d: Is a directory toaster.conf:auth_mechanisms = plain login digest-md5 cram-md5 [root at hermes dovecot]# On Wed, Oct 21, 2020 at 12:12 PM Aki Tuomi <aki.tuomi at open-xchange.com> wrote:> > > > On 21/10/2020 12:58 jesus san miguel <jesus.sanmiguel at gmail.com> wrote: > > > > > > I have certain power users who can't login through POP3 or IMAP from > > their computer while being receiving mail on their cell phones (pop3), > > despite pop3_lock_session = no > > > > Am I hitting some other limit? I don't see any error in dovecot.log > > but a generic failed login: > > > > Oct 21 10:31:44 imap-login: Info: Disconnected (auth failed, 1 > > attempts in 2 secs): user=<someuser at somedomain.com>, > > method=DIGEST-MD5, rip=::1, lip=::1, secured, > > session=<XSVQLSqy2IYAAAAAAAAAAAAAAAAAAAAB> > > > > Running version is 2.3.11.3 > > Do you support DIGEST-MD5 logins? If yes, then they have wrong password. > > Aki
On 2020-10-21 10:58, jesus san miguel wrote:> I have certain power users who can't login through POP3 or IMAP from > their computer while being receiving mail on their cell phones (pop3), > despite pop3_lock_session = no > > Am I hitting some other limit? I don't see any error in dovecot.log > but a generic failed login:I think there is a limit on the number of concurrent IMAP sessions that each user can have open at once, and the default is 5 or something fairly low. Modern smartphone IMAP clients can easily have that many sessions open, if the user is monitoring many folders for new mail, so when the user attempts to log in with another device they cannot because they have hit the limit. -- David Pottage
On Wed, 21 Oct 2020, David Pottage wrote:> I think there is a limit on the number of concurrent IMAP sessions that each > user can have open at once, and the default is 5 or something fairly low. > > Modern smartphone IMAP clients can easily have that many sessions open, if > the user is monitoring many folders for new mail, so when the user attempts > to log in with another device they cannot because they have hit the limit.Global searches using Apple mail readers will open as many concurrent mailboxes as your settings allow, even hundreds. However, they're closed in batches as well, so a graph of user mailbox connections will show sawtooth patterns. Joseph Tam <jtam.home at gmail.com>