Re: [cobalt-users] Sendmail

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

Bryan - Utopian Web Productions wrote:

> We just can't win this battle with SENDMAIL. Can anyone shed some light on
> this unforgiving problem I am facing - simply trying to send a mail()
> function through the server.
> 
> The following was captured from the internal mail server (root).

...<stuff snipped out of middle>...

>    ----- The following addresses had permanent fatal errors -----
> bryan@xxxxxxxxxxx
>     (reason: 501 <root@xxxxxxxxxxxxxxx>... Sender domain must exist)
> 
>    ----- Transcript of session follows -----
> ... while talking to uwebpro.com.:
> >>> MAIL From:<root@xxxxxxxxxxxxxxx> SIZE=88
> <<< 501 <root@xxxxxxxxxxxxxxx>... Sender domain must exist
> 501 5.6.0 bryan@xxxxxxxxxxxxxx Data format error

I'm going to presume you're sending mail from a Cobalt system with a
hostname of zulu and a domain name of gheeks.com.

If so, and if you don't have a valid DNS entry (A record or CNAME, but A
record is technically correct for a canonical hostname) for
zulu.gheeks.com, then some mail servers won't accept mail from you
because you might be a spammer trying to hide by not listing your domain
in DNS.

If you own the gheeks.com domain, then you must set up an A record for
it (wherever the gheeks.com domain has DNS hosted; not necessarily on
your Cobalt machine).  If you don't have control over the gheeks.com
domain, then you have to set up n A record for your server in a DNS zone
for which you do have control.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
nobaloney.net
P. O. Box 52672
Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205