Connection reset by peer_ 421 4.3.0 deliver: couldn't connect to lmtpd_

[Bartosz Jozwiak]

Hello,

I am running Cyrus IMAP for about a two years.
Sometimes I have following problem with postfix delivering messages to 
Cyrus:

temporary failure. Command output: couldn't connect to lmtpd: Connection 
reset by peer_ 421 4.3.0 deliver: couldn't connect to lmtpd_ )

And during that problem your not able to connect with pop3 and imap.

Only way to fix that problem is stopping Cyrus and starting again.
Does any body has idea what might cause such a problem?

Thank you in advance.
Regards,
bartosz 

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