Re: messages not arriving when users reply, strange smtp log, E2k3

From: solnFyou (solnFyou.1dvw25_at_mail.mcse.ms)
Date: 10/09/04

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Date: Sat, 9 Oct 2004 17:08:21 -0500

Jason,

I spend sevreal hour try to fix the same problem you are having. The
problem is "BDAT" is getting dropped because the server you are trying
to send to does not accept BDAT.
Go to internet Mail connector - advanced tab and click on send HELO
instead of HELO. This will fix your problem.
Good luck.

Thx

"Real answer from real experiance"

Quote=" Note: Because the receiver-SMTP does not acknowledge the BDAT
command before the message data is sent, it is important to send the
BDAT only to systems that have declared their capability to accept BDAT
commands. Illegally sending a BDAT command and associated message data
to a non-CHUNKING capable system will result in the receiver-SMTP
parsing the associated message data as if it were a potentially very
long, ESMTP command line containing binary data"

Jason wrote:
> *I've got a client having some really strange problems with mail not
> getting out.
>
> It's a new installation of sbs2k3, dns is configured properly.
>
> When they try to send outside their domain, the mail arrives as
> expected. If the recipient replies back and the original sender
> replies in turn, the message will not arrive.
>
> I have also noticed that randomly, when the recipient domain has a
> 2nd
> MX listed, it will choose that one instead of the primary.
>
> Here are some samples from the logs during one of these back and
> forth
> sessions:
>
> This is when the problem domain sends out a message to another
> domain-
>
> TGI:
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:38
> -0500] "- -?220 mail.domain2.com Microsoft ESMTP MAIL Service,
> Version: 5.0.2195.6713 ready at Thu, 16 Sep 2004 16:49:00 -0400
> SMTP"
> 0 115
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:38
> -0500]
> "EHLO -?mail2.domain1.com SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:38
> -0500] "- -?250-mail.domain2.com Hello [xx.12.181.44] SMTP" 0 40
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "MAIL -?FROM:<chris@domain1.com> SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?250 2.1.0 chris@domain1.com....Sender OK SMTP" 0 49
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "RCPT -?TO:<jason@domain2.com> SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?250 2.1.5 jason@domain2.com SMTP" 0 30
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "XEXCH50 -?2336 2 SMTP" 0 7
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?504 Need to authenticate first SMTP" 0 30
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "BDAT -?4442 LAST SMTP" 0 4
>
> This is what the recipient domain gets in their logs for the above
> message:
>
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:20 -0500] "EHLO
> -?+mail2.domain1.com SMTP" 250 317
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:20 -0500] "MAIL
> -?+FROM:<chris@domain1.com> SMTP" 250 51
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:21 -0500] "RCPT
> -?+TO:<jason@domain2.com> SMTP" 250 32
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:21 -0500]
> "xexch50
> -?+1872+2 SMTP" 504 32
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:21 -0500] "BDAT
> -?+<357A8981B09F8041954BDA3381A08CAA013F4D@thomas-w03sbs.domain1.local>
> SMTP" 250 110
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:46:21 -0500] "QUIT
> -?mail2.domain1.com SMTP" 240 64
>
> Next, when the recipient replies, this is what we get:
>
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:44
> -0500]
> "-
> -?220+mail2.domain1.com+Microsoft+ESMTP+MAIL+Service,+Version:+6.0.3790.0+ready+at++Thu,+16+Sep+2004+16:48:22+-0400+
> SMTP" 0 123
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:44
> -0500]
> "EHLO -?mail.domain2.com SMTP" 0 4
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:44
> -0500]
> "- -?250-mail2.domain1.com+Hello+[xxx.79.108.58] SMTP" 0 52
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:45
> -0500]
> "MAIL -?FROM:<jason@domain2.com> SMTP" 0 4
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:45
> -0500]
> "- -?250+2.1.0+jason@domain2.com....Sender+OK SMTP" 0 42
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:45
> -0500]
> "RCPT -?TO:<chris@domain1.com> SMTP" 0 4
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:45
> -0500]
> "- -?250+2.1.5+chris@domain1.com+ SMTP" 0 37
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:45
> -0500]
> "XEXCH50 -?2096+2 SMTP" 0 7
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:45
> -0500]
> "- -?504+Need+to+authenticate+first SMTP" 0 30
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:45
> -0500]
> "BDAT -?3927+LAST SMTP" 0 4
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:45
> -0500]
> "-
> -?250+2.6.0++<B51CCB5E8BC3A84D9FA66F52F9F42E238C2C39@exchange.domain2.local>+Queued+mail+for+delivery
> SMTP" 0 104
> xx.12.181.44 - OutboundConnectionCommand [16/Sep/2004:16:47:45
> -0500]
> "QUIT - SMTP" 0 4
> xx.12.181.44 - OutboundConnectionResponse [16/Sep/2004:16:47:45
> -0500]
> "-
> -?221+2.0.0+mail2.domain1.com+Service+closing+transmission+channel
> SMTP" 0 73
>
> And when the problem domain receives it back, here is the log entry:
>
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:31 -0500] "EHLO
> -?
> mail.domain2.com SMTP" 250 319
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:32 -0500] "MAIL
> -?
> FROM:<cboatwright@domain2.com> SMTP" 250 47
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:32 -0500] "RCPT
> -?
> TO:<chris@domain1.com> SMTP" 250 39
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:32 -0500]
> "xexch50
> -? 2036 2 SMTP" 504 32
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:32 -0500] "BDAT
> -?
> <B51CCB5E8BC3A84D9FA66F52F9F42E235564DA@exchange.domain2.local>
> SMTP"
> 250 106
> xxx.79.108.58 - mail.domain2.com [16/Sep/2004:16:53:32 -0500] "QUIT
> -?mail.domain2.com SMTP" 240 75
>
> And here the problem domain attempts to reply back to the last
> message:
>
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:38
> -0500] "- -?220 mail.domain2.com Microsoft ESMTP MAIL Service,
> Version: 5.0.2195.6713 ready at Thu, 16 Sep 2004 16:49:00 -0400
> SMTP"
> 0 115
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:38
> -0500]
> "EHLO -?mail2.domain1.com SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:38
> -0500] "- -?250-mail.domain2.com Hello [xx.12.181.44] SMTP" 0 40
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "MAIL -?FROM:<chris@domain1.com> SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?250 2.1.0 chris@domain1.com....Sender OK SMTP" 0 49
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "RCPT -?TO:<jason@domain2.com> SMTP" 0 4
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?250 2.1.5 jason@domain2.com SMTP" 0 30
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "XEXCH50 -?2336 2 SMTP" 0 7
> xxx.79.108.58 - OutboundConnectionResponse [16/Sep/2004:16:49:39
> -0500] "- -?504 Need to authenticate first SMTP" 0 30
> xxx.79.108.58 - OutboundConnectionCommand [16/Sep/2004:16:49:39
> -0500]
> "BDAT -?4442 LAST SMTP" 0 4
>
> And on the recipient side:
>
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:49:00 -0500] "EHLO
> -?+mail2.domain1.com SMTP" 250 317
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:49:00 -0500] "MAIL
> -?+FROM:<chris@domain1.com> SMTP" 250 51
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:49:00 -0500] "RCPT
> -?+TO:<jason@domain2.com> SMTP" 250 32
> xx.12.181.44 - mail2.domain1.com [16/Sep/2004:16:49:00 -0500]
> "xexch50
> -?+2336+2 SMTP" 504 32
>
> I have access to several more exchange servers that showed the same
> results. Occasinally they would also get a response similar to the
> last log entry I pasted when the problem domain sent the initial
> email, but that was rare in comparison.
>
> Can anyone decipher what's going on here? Any help or direction
> would
> be appreciated. Thanks! *

--
solnFyou
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