[cobalt-users] Re: cobalt-users digest, Vol 1 #1464 - 19 msgs

[Alfredo <alfredo@xxxxxxxxxxxxxxx>]

> Hi,
> Ive been in control of a raq3 server for a few weeks now and everything was
> working fine over a number of virtual sites until 3 days ago when mail
> simply stopped working.


Luke, when you say "virtual sites", are these name-based or is each 
tagged to its own IP? Reason is, if you're using name-based and you 
have more than one site under a particular IP, you should NOT set 
reverse look-up (PTR) records for more than one site per IP. That 
would play havoc with your email since email clients send email to 
the IP address and your server then distributes the mail based on the 
domain.

While you're at, maybe you should tighten up the Start of Authority 
records for each virtual site on the Raq3. Just go to the DNS portion 
of the GUI and this is what I'd suggest and it's not necessarily was 
Cobalt suggests but it's what everyone I know does (more or less):

an A record: whateverdomain.com pointing to the IP address. (no www) Then...

an A record (a second one): www.whateverdomain.com point to that IP address.

a mail server (MX) record: whateverdomain.com pointing to whateverdomain.com.

Don't mess with www or mail or any of that in the MX.

And NO reverse records for sites unless you're doing DNS on your own 
server and then you should do a reverse record for the primary dns 
domain. We actually run a secondary dns off this site and reverse 
that record as well. But we have several IP addresses here.

You don't have any c-names, right? Please say no. LOL

ALSO, check to make sure you have the web site with the email users 
on it receiving email for that domain. That's just to be safe and tie 
up all the loose ends.

Finally, just check to make sure these domains are listed as domains 
that can receive and send mail (that's in that email section of the 
server management control panel). They should go in there 
automatically when you do your dns and other settings but maybe 
something happened and they got wiped.

Course, if I'm wrong about the name-based stuff, none of this is 
relevant, I've wasted everybody's time and I'm not sure what your 
problem is. LOL

Alfredo

>

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