Road Runner 550 Unable to Relay Error

[Jason Clinton]

Paul Taylor wrote:
> There are few users in a house paying residential rates yet they run a
> home based business.
> Outgoing SMTP is smtp-server.kc.rr.com
> Incoming is not Road Runner, but their domain.
> It's a 100Mbps wired LAN.
>
> It only happens to two of the users and it started two days ago.
>
> I called Road Runner and I got "Using another incoming POP3 other than
> RR isn't supported and you're violating our terms anyway so we're not
> helping you."
>
> I think it's their SMTP outgoing mail server because I seen a bounce
> back when a user sent it to two different domains and the same bounce
> back message had 550 error with both domains listed. What other MTA on
> the Internet would see both outgoing mail at the same time other than
> your own MTA?
>
> Any help would be appreciated.
>
> Thanks,
> Paul

I really think I could help but I'm so confused about what you're asking
that I don't know where to start. Could you rephrase the question?

If your MTA sets the 'from' field to an address other than
someone at kc.rr.com, smtp-server.kc.rr.com will reject it. I think it will
also reject if the request to send comes from outside their network. It
used to be that you could check your pop-server.kc.rr.com address first
and then the smtp-server would let you through. It also used to be that
smtp-server.kc.rr.com would let you log in before sending. It's been
about six months since I had RoadRunner, though.

Regarding what I think is a question about what MTA's are out there, I
simply _love_ Mozilla Mail.

--
Jason Clinton
I don't believe in witty sigs.