This is a new one on me; maybe some of you have seen it before. Exchange
5.5 on NT4SP6a using the IMS to connect through an ISA server. On a handful
of hosts the message queues up with a "Host Unreachable" error. On most
hosts (including old favorites like aol.com, hotmail.com, etc.) mail comes
and goes just fine and we don't seem to be having any problems RECEIVING
mail.
But to this small band of hosts (including hawaii.edu and hawaii.rr.com) the
mail just queues up. Here's a snippet from an SMTP log that may shed some
light:
3/19/02 12:15:06 PM : >>> MAIL FROM:<[EMAIL PROTECTED]> SIZE=1977
RET=FULL
3/19/02 12:15:06 PM : <<< IO: |250 2.1.0
[EMAIL PROTECTED] OK
|
3/19/02 12:15:06 PM : <<< 250 2.1.0 [EMAIL PROTECTED]
OK
3/19/02 12:15:06 PM : >>> RCPT TO:<[EMAIL PROTECTED]>
NOTIFY=FAILURE,DELAY
3/19/02 12:15:06 PM : <<< IO: |250 2.1.5 [EMAIL PROTECTED]
|
3/19/02 12:15:06 PM : <<< 250 2.1.5 [EMAIL PROTECTED]
3/19/02 12:15:06 PM : >>> DATA
3/19/02 12:15:06 PM : <<< IO: |354 Start mail input; end with
<CRLF>.<CRLF>
|
3/19/02 12:15:06 PM : <<< 354 Start mail input; end with
<CRLF>.<CRLF>
3/19/02 12:16:22 PM : 499 Host unreachable: cta.net. Message
subject: ""Plain Text Test"". Rescheduling delivery for later.
Notice that it seems to be going fine until it gets the 354 message, then it
sits for a little over a minute and seems to time out. This particular test
message was just a couple of lines of plain text; so it shouldn't be a size
issue.
We've already restarted the IMS several times and the entire Exchange server
once. Judging by the oldest message in the queue this problem seems to have
started this weekend and no unusual system maintenance or changes occurred
over the weekend. As far as I know we were able to send mail to/from those
domains just fine on Friday.
Baffling. Any thoughts on what might be causing this and how we can resolve
it?
-Ben-
Ben M. Schorr, MVP-Outlook, CNA, MCPx3
Director of Information Services
Damon Key Leong Kupchak Hastert
http://www.hawaiilawyer.com <http://www.hawaiilawyer.com>
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