lmtp read timeout

[Lindner]

Hi, i'm using Cyrus 2.1.12 and Postfix 2.0.6 (SuSE 8.2). Since a year i'm working with Cyrus and had no problems i couldn't solve but this lmtp read timeout is driving me around the bend.  ;-)   Thats why i'm starting this discussion: I administrate several mailsystems for different companies. As i'm a LINUX fan they all run on that lovely system.  :-) 2 months ago one of the servers stopped delivering eMails with the hint: "lmtp read timeout". Since then i tried to get more information about lmtp and Cyrus but i failed. Do not misunderstand: I googled that problem for hours and read through multiple mail archives but the result didn't satisfy me. Obviously i'm not the only one with that problem but nobody had a real solution. Again i had to realize that Cyrus is a nice piece of software but not well documented. I hope together we will overcome that problem. Summary of my knowledge about this issue: Postfix (or any other MTA) gets an eMail for local delivery. After checking wether to accept the mail or not Postfix will scan for viruses and SPAM (in my case). Finally the mail will be given to the MDA Cyrus. LMTP transports the mail from Postfix to Cyrus because Postfix can't store the mail directly in the Cyrus mailbox. This transport from Postfix to Cyrus fails and the logfile says: lmtp read timeout.  -> lmtp read timeout <- What problem is meant ? Postfix is writing to the unix socket but nobody reads from the socket or Cyrus is reading from the socket but nobody is writing to it ? How can that happen ? The unix-socket is starting on boot and isn't supposed to read/write all the time. That would mean Postfix has to initiate a connection to sign that the reading should start.  So, Postfix can establish a connection but can't send the mail through ? Any other ideas ?? Greetings Marek Lindner