You believe correctly. :) Not sure we'll figure out whose router it was, but as long as it doesn't happen again I don't much care.
-Ben- > -----Original Message----- > From: Daniel Chenault [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, March 19, 2002 7:59 PM > To: Exchange Discussions > Subject: Re: Some "Hosts Unreachable" - Follow-up > > > The term, I believe, is black-hole router. > > ----- Original Message ----- > From: "Ben Schorr" <[EMAIL PROTECTED]> > To: "Exchange Discussions" <[EMAIL PROTECTED]> > Sent: Tuesday, March 19, 2002 9:54 PM > Subject: RE: Some "Hosts Unreachable" - Follow-up > > > > Well, the problem is resolved but nobody's entirely sure how. It > > looks > like > > it was an issue with a router somewhere upstream discarding > improperly > sized > > packets instead of responding properly (Q136970 is sort of related) > > but whose router and what they did to fix it we don't know > for certain > > just > yet. > > > > What a day. > > > > -Ben- > > Ben M. Schorr, MVP-Outlook, CNA, MCPx3 > > Director of Information Services > > Damon Key Leong Kupchak Hastert > > http://www.hawaiilawyer.com > > > > > > > -----Original Message----- > > > From: Ben Schorr [mailto:[EMAIL PROTECTED]] > > > Sent: Tuesday, March 19, 2002 1:00 PM > > > To: Exchange Discussions > > > Subject: Some "Hosts Unreachable" > > > > > > > > > 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> > > > > > > > > > _________________________________________________________________ > > > 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] > > > > _________________________________________________________________ > 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]
