I asked earlier about having an incorrect hostname, and it affecting emails (i.e. some email doesn't go through).
Here's a copy of a returned email (the references to "sewage" are my hostname; I have my hostname setup as "sewage"): >From MAILER-DAEMON Wed Aug 19 19:43:05 1998 Return-Path: <MAILER-DAEMON> Received: from sewage by sewage via smail with bsmtp id <[EMAIL PROTECTED]> (Debian Smail3.2.0.101) for <lgunman>; Wed, 19 Aug 1998 19:43:04 -0500 (CDT) Message-Id: <[EMAIL PROTECTED]> Date: Wed, 19 Aug 1998 19:43:04 -0500 (CDT) From: <[EMAIL PROTECTED]> To: lgunman Subject: mail failed, returning to sender Reference: <[EMAIL PROTECTED]> Status: RO Content-Length: 587 Lines: 14 |------------------------- Failed addresses follow: ---------------------| <address_of_intended_receiver> ... transport smtp: 501 <[EMAIL PROTECTED]>... invalid host name sewage, check your configuration. |------------------------- Message text follows: ------------------------| Received: by sewage via send-mail from stdin id <[EMAIL PROTECTED]> (Debian Smail3.2.0.101) for <unknown>; Wed, 19 Aug 1998 19:43:02 -0500 (CDT) Message-Id: <[EMAIL PROTECTED]> Date: Wed, 19 Aug 1998 19:43:02 -0500 (CDT) From: lgunman (the lone gunman) To: <address_of_intended_receiver> Subject: test [body not included]