[BlueOnyx:18529] Re: 5209R hostname

[Ernie]

Hi Michael,
some spam checking tools look at the 220 response string of the sending
server to make sure it matches the PTA and A rec.


Another question(s), what's the story with the file format of the secondary
DNS zone files on 5209R? They no longer seem to be in readable text format.

How can you convert them into normal zone files? eg. if you have an emergency
and have to make a secondary at your DR site, into a primary DNS


- Ernie.


> Hi Ernie,
> 
> > The hostname on 5209R is not showing the FQDN only showing the host
> > part, missing the domain, this screws up the 220 greeting string on
> > sendmail so it doesn't fully match the A records and PTR records.
> > 
> > Previous versions of BlueOnyz set the host name properly.
> 
> Yeah. EL7 changed that part of the behaviour. It doesn't matter if you
> put the correct HOSTNAME string into /etc/sysconfig/network. It doesn't
> matter if you put the domain name or the full FQDN into /etc/hostname:
> 
> "uname -a" will only report the domain name, not the FQDN. OTOH:
> "hostname -a" does show the full FQDN. This behaviour is different from
> all previous versions of RHEL and CentOS - for no good reason.
> 
> As far as Sendmail goes: You're right, the "220" only shows the
> hostname. But anything else (see the "221") makes clear that Sendmail is
> fully aware of the full FQDN:
> 
> mstauber at beast:~/$ telnet 5209r.smd.net 25
> Connected to 5209r.smd.net.
> Escape character is '^]'.
> 220 5209r ESMTP Sendmail Ready; Sat, 17 Oct 2015 11:06:09 -0500
> quit
> 221 2.0.0 5209r.smd.net closing connection
> Connection closed by foreign host.
> 
> I'm not sure how this can be tackled. Or if it should be in first place.
> 
> -- 
> With best regards
> 
> Michael Stauber
> _______________________________________________
> Blueonyx mailing list
> Blueonyx at mail.blueonyx.it
> http://mail.blueonyx.it/mailman/listinfo/blueonyx

-- 
"I Ping therefore I am."