Re: [cobalt-users] RAQ2 Unable to get canonical name of client

[flash22@xxxxxxx]

On Thu, 10 Jan 2002, Paul Alcock wrote:

> I love it when folks post messages that lead me to a problem (sic)
> Ok, I took a look at the /var/log/maillog with tail and found
> quite a lot of msg's stating....
> Jan 10 09:22:34 raq2 in.qpopper[29154]: (v?)
> Unable to get canonical name of client xxx.xxx.xxx.xxx: Unknown host (1)
> [pop_init.c:401]
> 
> ( I have replaced my PC IP with xxx.xxx.xxx.xxx in the line above)
> 
> Is this a Problem?

Not really, it's a client problem, the client IP address doesn't reverse
to a domain name, this will only affect the client's ability to receive
mail, not the server's ability to send it. And it probably won't even do
that, other than making it slow.

> And could it be an indicator why AOL refuses my email?

No, What error does aol give you back? THey usually say why they refuse
email....
One thing they won't like is if the claimed name of your mail server
doesn't match the actual domain name, and also doesn't resolve back to
it's IP, eg, certain DNS errors will tend to make AOL believe you are
trying to hide your identity (typical of spammers)..

> RAQ 2 all patches installed, SSL and SSH.

And up to date webform scripts etc?

gsh