> -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Nigel Kendrick > Sent: Monday, May 09, 2005 8:05 AM > To: 'CentOS mailing list' > Subject: RE: [CentOS] Centos 4 / Postfix / SMTP - SORTED > > OHMYGOD I am a grade 1 pillock: > > All sites hosting our mail servers have Zen as their ISP but where I am > now > it's using BT - so I guess it's not a good idea to try and use Zen's > server > from a BT account - mind you some kind of error return when I tried to > connect might have helped! Most mail servers will return a '550 Relaying not allowed' error message. If Zen doesn't do that then it's a configuration decision on their part. -- Marc