This is actually related to my previous question ... I just configured my cyrus server to accept mails directly from my remote postfix server over lmtp Everything seems to work fine but sometimes lmtp gives strange errors like to=<X>, orig_to=<X>, relay=202.162.229.40[202.162.229.40]:24, delay=0.26, delays=0.25/0/0/0.01, dsn=5.1.1, status=bounced (host 202.162.229.40[202.162.229.40] said: 550-Mailbox unknown. Either there is no mailbox associated with this 550-name or you do not have authorization to see it. 550 5.1.1 User unknown (in reply to RCPT TO command)) When actually the mailbox is valid. The same mail sent again reaches the mailbox without problems. The cyrus server is highly loaded most of the time. I want lmtp (over tcp) to give tempfail instead. I am already ensuring mbox exists at smtp level Thanks Ram ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html