On 21 Jun 2020, at 07:32, David Hartley <da...@sharproad.uk> wrote:
erhaps not surprisingly the best MTU value turned out to be 1492, so I set my
network card to 1492.
Since then I have received two emails from btinternet.com.
On 21.06.20 09:59, @lbutlr wrote:
But this problem was isolated to only mails for BT? You would get mails fine
from, say, google.com and this list?
If so, I am surprised.
I guess there are not so many networks dropping ICMP packets.
IIRC this was reported for yahoo but that was years ago.
It apparently comes from lack of knowledge and stupid idea that ICMP is bad
and may be blocked safely.
--
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