[cobalt-users] Re: Relay Mail Error

["David Thacker" <Cobalt@xxxxxxxxxxxxxx>]

Mike:

Check to make sure that the IP address AND domain of the SMTP server you want
your client to use for SMTP is listed in the Relay for the following
Hosts/Domains box on the Email Parameters page.  If you've added a host alias
for the mail server (eg. mail.domain.com) that you want your user to send
through, then make sure it is listed in the Host/Domain Aliases box.

Now the yucky part.  If you do not employ POP-before-SMTP, then you must also
ensure that their IP connection domain is listed in the relay box.  For
example, if they have a dialup connection from ibm.net, then you have to add
ibm.net into the relay box.  Doing so opens your email server up to everyone
else who happens to be connected via ibm.net, which is most likely a Bad Idea.
If you can narrow it down a bit to a particular subnet (eg.
dialup.dallas.ibm.net) then you narrow your exposure, but still...

POP-before-SMTP is definitely recommended if that client has a POP account on
your server, but this may not always be the case.

Dan:

No, I believe you are mistaken here.  You do not need to add any relay entries
for domains that user send TO, only for domains that users send FROM.  If you
add a relay entry for ibm.net, then a user connected via ibm.net can send to
ANY domain without having to list the receiving domains.

dAvid tHacker
Thacker Network Technologies Inc.
Cobalt@xxxxxxxxxxxxxx


----- Original Message -----
> Message: 8
> Reply-To: <dan@xxxxxxxxxxxxx>
> From: "Dan" <dan@xxxxxxxxxxxxx>
> To: <cobalt-users@xxxxxxxxxxxxxxx>
> Subject: RE: [cobalt-users] Relay Mail Error
> Date: Wed, 21 Jun 2000 15:48:42 -0400
> charset="iso-8859-1"
> Reply-To: cobalt-users@xxxxxxxxxxxxxxx
>
> > I only want one domain to be able to send mail(SMTP) through our
> > RaQ3 but I
> > keep getting a 550 can not realy mail error. I just put the users domain
> > name in relay mail blank.
> >
> > Am I doing this right?
> >
> Nope. AFAIK, you can't allow just one to send via your SMTP. Either you have
> POP before SMTP authentication, or you have every possible domain name that
> the client would like to send mail to listed as allowed relays.
> --
> Dan Kriwitsky
> 
>