[CentOS] Sendmail and pmtu discovery

Sean Carolan wrote on Tue, 14 Oct 2008 08:13:34 -0500:

> 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?

Kai

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Kai Schätzl, Berlin, Germany
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