On Tue, 26 Jun 2001, Adam M. Costello wrote:
> failure to deliver a notification causes another notification, the
> latter should have a counter value one greater, and the notification
> should be suppressed if the counter gets too large.
dunno how 'usual' it is, iirc sendmail stops after the message has
passwed 30 (def setting) hops, which, i think, is reasonable.