From: Lewis Shobbrook (no email)
Date: Wed Jul 02 2008 - 22:38:50 EDT
Hi Wietse,
Thanks for the help.
> I suppose you didn't spot any specific differences in the way that
> EMSP is being spoken, such as:
>
> - ESMTP command PIPELINING (MAIL FROM+RCPT TO+DATA in one TCP packet)
>
> Try turning off PIPELINING for borked sites:
Did not alter the result.
The issue was fixed by lowering the mtu to 1400.
I finally noted some missing checksums with -vv.
I' d not gone this low before, but it was apparently necessary.
Hope I didn't waste your time.
Thanks again,
Lewis
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