RE: [Exim] Mail Delivery Problems?

Well, I did that, but I still can't make heads or tails of the 50+ pages of
results... none of which had to do with hotmail or the domain in question.

> > Diagnostic-Code: smtp;451 Temporary local problem - please
> try later
>
> this is an exim error message. you do have some kind of problem. what
> exactly is up to you to find in the logs ;) you probably want to
> grep 'T=.[^ ]* defer' /path/to/mainlog to find the cause.