14 Oct
2008
14 Oct
'08
3:09 p.m.
Kai Schaetzl wrote:
My mail logs are showing that customers who specifically disallow ICMP traffic have many "Connection Reset" entries in our logs:
Could somebody explain why ICMP might play a role in mail delivery?
It is required for any TCP conversation, unless as a matter of luck you happen to have the same MTU capability across the whole path - or the end points restrict their MTUs arbitrarily to a size that everything can handle.
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Les Mikesell
lesmikesell@gmail.com