[TriLUG] sendmail and roadrunner

[David A. Cafaro]

Maybe a dynamic dns setup using that dns name as your routers.  I 
use  http://www.dyndns.org/ and am very happy with them.  They have Linux 
clients.

That way when others (xo.com, aol.com.etc..) do a check on your Hostname 
they will actually get a record for the domain name.  This won't help if 
they are doing reverse DNS lookups (check the IP, go to the IP owners DNS 
servers and do a lookup for the dns that matches the IP).  But your error 
looks more like a hostname lookup than a reverse dns lookup.

-David



At 08:50 AM 2/26/2002, you wrote:
>Is anyone out there using their primary roadrunner machine (i.e. the one with
>the "live" IP address) as a mail relay host?  Most domains accept my mail
>just fine but others (xo.com, aol.com most noteably) reject my mail returning
>some version of the following error:
>
>... while talking to triton.xo.com.:
> >>> MAIL From:<greg at paloverde.nc.rr.com> SIZE=866
><<< 501 5.1.8 <greg at paloverde.nc.rr.com>... Sender domain must exist
>
>I imagine this is due to roadrunner not adding my host name, paloverde, to
>DNS when it assigns the IP address.  So, the question becomes is there any
>way to fix this so I can mail my partents at their AOL address using my
>machine (paloverde) as a mail router?  And, just in case anyone is worried, I
>am an avid anti-spammer and I'm not trying to use my machine to spam.
>
>I am running RH 7.1 and I checked the /etc/mail/sendmail.mc file but I can't
>see anywhere in the file where I can fix this problem.
>
>Any help would be greatly appreciated.
>
>Thanks!
>
>Greg
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