[BlueOnyx:10402] incorrect HELO

[Colin Jack]

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.

Thanks

Colin