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Topic: Problem with Dovecot ?

Dear,
We are facing a madness problem:
When my users send mail to client, an error message occur with following message
"Message not copy in sent folder", sometimes thunderbird not connect with mail server, But when i restart my dovecot service, it's run fine and after some hours, minutes, problem occur again.
Please i need your assistance.
Problem with my certificate ?
Problem with dovecot ?
Problem with session of dovecot?

looking for valuable reply.
thanks

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Re: Problem with Dovecot ?

Any error log in Dovecot log file? /var/log/dovecot.log

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Re: Problem with Dovecot ?

No..it's show perfect...but in mail.warn
Apr  2 09:55:27 mail fetchmail[28277]: reading message multi-drop-box@indebo.in@mail.indebo.in:1 of 1 (5004 header octets) (log message incomplete)
Apr  2 09:55:27 mail fetchmail[28277]: SMTP error: 501 5.1.3 Bad recipient address syntax
Apr  2 09:55:27 mail postfix/smtpd[9328]: warning: Illegal address syntax from localhost.localdomain[127.0.0.1] in RCPT command: <=?iso-8859-1?Q?=A0indebo@indebo?=.com , accounts@indebo.com ,mail@indebo.com>
Apr  2 09:55:27 mail fetchmail[28277]: SMTP error: 501 5.1.3 Bad recipient address syntax
Apr  2 09:55:27 mail postfix/smtpd[9328]: warning: Illegal address syntax from localhost.localdomain[127.0.0.1] in RCPT command: <pauly@indebo.com , pankajs@indebo.com>
Apr  2 09:55:27 mail fetchmail[28277]: SMTP error: 501 5.1.3 Bad recipient address syntax
Apr  2 09:55:27 mail fetchmail[28277]: mail from MAILER-DAEMON@mail.indebo.in bounced to postmaster@indebo.in
Apr  2 09:55:51 mail postfix/smtpd[9328]: warning: TLS library problem: 9328:error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:s3_pkt.c:1053:SSL alert number 48:


here is message, After restart dovecot service then users get certificate. Any problem with certificate or user limit is exceed.
We have only 66 users.