Could be running spamassassin or some kind of milter that refuses the message if it is determined to be spam.
-----Original Message----- From: Andrey Fyodorov [mailto:[EMAIL PROTECTED]] Sent: Monday, January 13, 2003 2:46 PM To: Exchange Discussions Subject: messages frozen in an SMTP queue Hi all. I have Exchange 2000, SP3. Due to company's needs some of our mail is being directly forwarded to another mail server which is running on Linux and someone else is taking care of that mail server. That persona also thinks that there could be no problems on the Linux side. Here is the problem. Some of the mail that our Exchange server receives and forwards to the Linux server is spam. Some of this spam gets stuck (frozen) in the Linux server -bound SMTP queue. The queue goes into retry state with comment "connection was dropped by the remote host". Once the "bad" message gets frozen, all the subsequent messages get stuck - Linux server keeps dropping connection every time the Exchange server retries the bad message, and the good messages can't flow "around" the bad one. The Linux guy just thinks that this is Exchange problem, since they receive mail from everywhere else without problems. The Exchange SMTP logs don't show anything specific - MAIL FROM is OK, RCPT TO is OK, Exchange server says DATA and Linux server says READY FOR DATA. That's when there is no more communication until the next retry. The Linux guy says "oh, your Exchange server does not understand READY FOR DATA and times out". To which I answer, "how about 99% of messages that the Echange server delivers to your Linux server without problems?" So I fished out the file of the bad message from the queue and tried to BLAT it directly to the Linux server. BLAT failed. So to me it looks like the problem is with the data in the message, and Linux server does not like it. When I look at the message file in Notepad, I see a bunch of weird square [] characters, probably un-common carriage returns. My feeling is that the Linux server does not like those characters or their quantity. Does anyone here have experienced similar problems when sending mail from Exchange to Linux? _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
