> Yes, I've dealt with these people. If they turn off all ICMP, they often > drop fragments as well, making the problem even worse. You can sometimes get > them to listen by asking them if their Internet access seems a little > "weird" in that some sites work sometimes or downloads are slow or they > can't get some email :-) What do you do when the receiving server is at Microsoft? (mx4.hotmail.com) Oct 28 11:18:25 exmx2 sendmail[19190]: m9SGHXL4019186: to=<some.user at hotmail.com>, delay=00:00:52, xdelay=00:00:52, mailer=esmtp, pri=43523, relay=mx4.hotmail.com. [65.54.244.232], dsn=4.0.0, stat=Deferred: Connection reset by mx4.hotmail.com. I'm not surprised that Microsoft would make such a boneheaded decision as to block all ICMP traffic to their hotmail servers, however would this not cause a ton of customer email to simply be lost? Do they just not care? I guess at this point my only choice may be to lower my MTU size.