I am not receiving the emails that one of my friends is sending me. It really doesn't make sense. I use the Horde interface, though I should hope that wouldn't be the problem. She's tried typing in my email address, copy and pasting, replying-to, etc. Is there anyway that I'm blocking her? I still receive emails from other people, just not her.

I don't think she receives any mailer-damon, etc, when she writes me, but I'll ask to be sure. Any ideas for what we can do on her end? Es ist sooo komisch.  

Turns out she was getting a message back:

> This message was created automatically by mail delivery software.
>
> A message that you sent could not be delivered to all of its recipients.
>
> Below you can find the mail addresses that failed and the reason given
> by the server that has been contacted for this address.
>
> You sent this mail through our old unsecured mail relay. If your mail
> has been rejected due to an RBL list entry (eg.
> http://mail-abuse.org/), you should consider using our server with
> SMTP authentication. For further information have a look in your FAQ
> or contact your technical support.
>
> -- Fehlgeschlagene Adresse(n) / Failed Address(es) ---------------------
>
>   [my address]
>     Connection timed out:
>     retry timeout exceeded

She's using outlook. How can I control the spam assassin?

Do you know specifically where the SMTP option is, she's using a German version so when I browsed around for it, I couldn't find it.

--Drake