[Linux] Postfix help

[Michael Marschall]

Hmm my guess is that his 'relayhost' is not the only thing to change if he has
gone from one provider to another. If his mailer cannot resolve the following:

gold $ host smtp.comcast.net 
smtp.comcast.net has address 216.148.227.147
smtp.comcast.net has address 63.240.77.77
smtp.comcast.net has address 204.127.192.17
smtp.comcast.net has address 204.127.200.17
smtp.comcast.net has address 204.127.225.17
smtp.comcast.net has address 206.18.177.17

then my guess is that his /etc/resolv.conf needs to update as well to point to
his new provider's name servers :^). Also none of the below hostnames has an ip
that matches the above ip's:

gold $ host -t mx comcast.net 
comcast.net mail is handled by 5 gateway-r.comcast.net.
comcast.net mail is handled by 5 gateway-s.comcast.net.
comcast.net mail is handled by 5 gateway-a.comcast.net.

Check resolv.conf and make sure the values there are set to comcast's
nameservers.

Mike 

--- Mike Harbison <Mharbison@QQonline.com> wrote:

> I believe the MX record for comcast is comcast.net  
> 
> drop the smtp and try it.
> 
> mike.
> 
> On Tue, 2007-05-15 at 12:30 -0400, David Williams wrote:
> > I can try that, but if I ping smtp.comcast.net from the postscript server
> it comes back just fine.
> > 
> > Regards,
> > ____________________________________________
> > David Williams
> >  
> > -----Original Message-----
> > From: linux-admin@flux.org [mailto:linux-admin@flux.org] On Behalf Of Mike
> Harbison
> > Sent: Tuesday, May 15, 2007 12:20 PM
> > To: linux@flux.org
> > Subject: Re: [Linux] Postfix help
> > 
> > use the IP address instead of the domain name.
> > 
> > Give it a try.
> > Mike.
> > On Tue, 2007-05-15 at 12:20 -0400, David Williams wrote:
> > > Hi all,
> > > 
> > >  
> > > 
> > > I need help with postfix.  For some reason my outgoing SMTP has
> > > stopped working.  My account was recently transferred from Adelphia to
> > > Comcast, along with that came a new SMTP server for Comcast.
> > > 
> > >  
> > > 
> > > I’ve updated my main.cf file to the following:
> > > 
> > >  
> > > 
> > > relayhost = smtp.comcast.net
> > > 
> > >  
> > > 
> > > But, when ever I try and send an email I get the following in the log
> > > file:
> > > 
> > >  
> > > 
> > > May 15 11:58:24 dtwconsulting postfix/qmgr[5606]: 07F8845880:
> > > to=<dwilliams@XXXXXXXXXXX.com>, relay=none, delay=61238,
> > > delays=61218/20/0/0, dsn=4.4.3, status=deferred (delivery temporarily
> > > suspended: Host or domain name not found. Name service error for
> > > name=smtp.comcast.net type=MX: Host not found, try again)
> > > 
> > >  
> > > 
> > > Can anyone provide any help on this ?
> > > 
> > >  
> > > 
> > > As some additional info, I setup Outlook to directly use the Comcast
> > > SMTP server and it went through just fine.  So, why is my smtp server,
> > > which points to the Comcast SMTP server not working ?  Does Comcast
> > > have some additional security in place ?   Seems weird to me.  By the
> > > way, my postfix server is on my local (Comcast) network.
> > > 
> > >  
> > > 
> > > Any help would be much appreciated.
> > > 
> > >  
> > > 
> > >  
> > > 
> > > Regards,
> > > 
> > > ____________________________________________
> > > 
> > > David Williams
> > > 
> > >  
> > > 
> > > 
> > 
> > _______________________________________________
> > Linux mailing list
> > Linux@flux.org
> > http://www.flux.org/mailman/listinfo/linux
> > 
> > 
> > No virus found in this incoming message.
> > Checked by AVG Free Edition. 
> > Version: 7.5.467 / Virus Database: 269.7.0/804 - Release Date: 5/14/2007
> 4:46 PM
> >  
> > 
> > _______________________________________________
> > Linux mailing list
> > Linux@flux.org
> > http://www.flux.org/mailman/listinfo/linux
> 
> _______________________________________________
> Linux mailing list
> Linux@flux.org
> http://www.flux.org/mailman/listinfo/linux
> 



       
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