My apologies everyone, I figured out the problem. I had an e-mail account
configured to send through a previously canceled netzero account, so it was
qmail at smtp.netzero.net. I didn't figure it out until I googled the error
message and it brought up qmail multiple times.
> > 553 sorry, that domain isn't in my list of allowed
> rcpthosts (#5.7.1)
>
> That is a qmail relaying denied message.
>
> Post some logs please?
