On Tue, October 14, 2008 09:31, Kai Schaetzl wrote: > 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? ICMP is involved in IP routing, including MTU discovery, announcing failed connections, and so forth. Email is delivered over IP. QED. -- David Dyer-Bennet, dd-b at dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info