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.
--
Les Mikesell
lesmikesell at gmail.com