PMTU bug -- or better said, bad firewall admin who blocks all ICMP.
http://blue-labs.org/clue/mtu-mss.php
-david
David Brownell wrote:
I'm seeing a problem with TCP as accessed through KMail (SuSE 9.2, x86_64).
But oddly enough, only for sending mail, not reading it; and not through
other (reading) applications... it's a regression with respect to rc1 and
earlier kernels. Basically, it can only send REALLY TINY emails...
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