There is nothing bad in the SMTP log. The Linus server says "ready for data". That's it. No more records of this session.
There is nothing bad in the Event Log either (cranked to max logging) My first guess (based on previous experience) was that the Linux server had some kind of antispam feature. I told the Linux guy to give a little slack for connections from Exchange server, to which he replied that they did not use any antispam programs on Linux. ----- Original Message ----- From: "B. van Ouwerkerk" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Sent: Monday, January 13, 2003 5:35 PM Subject: Re: messages frozen in an SMTP queue > The Linux box might have some protection in place to prevent spam. > Blacklist, Sendmail configuration ( like sender domain does not resolve), > others. > > Be nice to the Linux guy and ask if that might be the case. > > I don't believe in many problems while communication between Exchange and > Linux. I'm maintaining several Sendmail (Linux) and Exchange (various > flavors of NT) and never found any problem during the communication.. > > It would be interesting to see the error in your SMTP logs.. perhaps it > explains more.. The Linux guy could possibly provide you with the relevant > part of their messages log or syslog. Which they use depends on distro and > how they configured it. > > Don't get yourself into a "your OS sucks" discussion.. it will not get you > any closer to a solution.. Even if you're sure the problem is caused by the > configuration of the Linux box, it might still be an Exchange problem if > mail gets stuck in a queue. > > > > --B. > > > At 16:45 13-01-2003 -0500, you wrote: > >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]
