RE: [cobalt-users] Sendmail relaying denied error

["Tolentino, Elmer" <etolentino@xxxxxxxxx>]

INRE RE: [cobalt-users] Sendmail relaying denied error:
> > Hello Everyone,
> >
> > First time here.  I am lost in this issue.  I am getting a
> > relaying denied error emailing to a domain and it is the only
> > domain having this problem.
> >
> > I have no clue why the heck it is relaying this domain or
> > appears that it is bouncing between servers.
> >
> > Here is the error I am getting:
> >
> > Message from  yahoo.com.
> > Unable to deliver message to the following address(es).
> >
> > <elmert@xxxxxxxxxxxxxxxxx>:
> > 208.144.236.201 does not like recipient.
> > Remote host said: 550 5.7.1 <elmert@xxxxxxxxxxxxxxxxx>... Relaying
> > denied.  Please check your mail first or restart your mail
> > session. Giving up on 208.144.236.201.
> >
> >Are you sure you have arthur-lerner.com in the email alias field in
the
>
> site settings for the virtual site?
>
> I have that in the email server alias and I see the entry in
> virtusertable:
> @arthur-lerner.com	%1@xxxxxxxxxxxxxxxxxxxxx
>
> >       'elmert@xxxxxxxxxxxxxxxxx' on 3/17/2003 2:55 PM
> >             You do not have permission to send to this
> > recipient.  For assistance, contact your system administrator.
> >             <inovxmail.inovx.com #5.7.1 smtp;550 5.7.1
> > <elmert@xxxxxxxxxxxxxxxxx>... Relaying denied. IP name lookup
> > failed [208.144.236.130]>
> >
> >Those are the same error messages I see in my maillog for domains I
>
> have
> in DNS but do not have set up as a virtual domain on the server.
>
> This is pretty odd though since when I delete and recreate, then the
> domain works again with all the users.  But what if this domain has a
> lot of users, then this would really be a pain.  Trying to see what
> actually causes this...

>For one thing none of your IP seem to have "reverse" DNS.

>mail.arthur-lerner.com relates to 208.144.236.201, but
>208.144.236.201 does not... (and neither does 208.144.236.130).

>I just sent a test email to the address in your message 
>(elmert@xxxxxxxxxxxxxxxxx) and it was at least delivered to IP 
>208.144.236.201.  Be interested to see if you actually get it.

It works now because I deleted the site and re-created it.  But why
would I have to do this for this domain.  All the other domains work
fine.  Why do I need to have "reverse" DNS setup.  When someone sends an
email to this domain it should query the remote DNS hosting's nameserver
then see that the MX record is pointing to 208.144.236.201 and then the
mail server should be able to route it to a user from that domain.

>-- 
>Larry Smith
>SysAd ECSIS.NET
>sysad@xxxxxxxxx

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