[BlueOnyx:10405] Re: incorrect HELO

[Colin Jack]

> On 04/30/2012 05:02 AM, Colin Jack wrote:
> > We recently updated one of our servers (VPS on Aventurin{e}) using yum and
> now have been listed on CBL because "This IP address is HELO'ing as
> "localhost.localdomain" which violates the relevant standards (specifically:
> RFC5321)"
> >
> > Looking in my hosts file I have
> >
> > # /etc/hosts
> > # Auto-generated file.  Keep your customizations at the bottom of this file.
> > 127.0.0.1        localhost localhost.localdomain
> > 192.168.2.6             server1.localdomain  server1-venet0:0.localdomain
> server1-venet0:0
> > #END of auto-generated code.  Customize beneath this line.
> > 127.0.0.1 localhost.localdomain localhost server1.fast-mail.net #
> > Auto-generated hostname. Please do not remove this comment.
> > 192.168.2.6 server1.<CORRECTDOMAIN> server1-venet0:0.localdomain
> > server1.localdomain server1-venet0:0.<CORRECTDOMAIN>  server1 server1-
> venet0:0 ### Begin - Nuonce hosts Fix
> > 127.0.0.1       server1.<CORRECTDOMAIN>
> > 192.168.2.6     server1.<CORRECTDOMAIN>
> > ###  End  - Nuonce hosts Fix
> > [root at server1 etc]#
> >
> > I amended the details as follows, but obviously these are auto-generated and
> it will 'break' again. Where else can I fix this permanently?
> >
> > # /etc/hosts
> > # Auto-generated file.  Keep your customizations at the bottom of this file.
> > 127.0.0.1        server1 server1.<CORRECTDOMAIN>
> > 192.168.2.6             server1.<CORRECTDOMAIN> server1-
> venet0:0.localdomain server1-venet0:0
> > #END of auto-generated code.  Customize beneath this line.
> >
> 
> FYI the heder in this email
> 
> from localhost.localdomain (localhost [127.0.0.1]) by lists.blueonyx.it
> (8.13.8/8.13.8) with ESMTP id q3UA2seA009436; Mon, 30 Apr 2012 06:03:01
> -0400
> 
> Unless you modified /etc/hosts after.
> 
> What does executing ' hostname ' yield/
> 
> --
> Gerald

Now that header is interesting - because my email came from an Exchange 2010 server - the server in question above is in a datacentre and provides SMTP relay services for our clients. It has nothing to do with our internal email ;)

On the server in question, 'hostname' resolves correctly. The problem is that the sendmail HELO doesn't.

Colin