How I can solve this problem?

[ouldm@linux-at-business.com]

Hello,

I'm using  Courrier-IMAP on my Lan server and IMAP 2000a/Horde/IMP on my

Relay. The two machines are separated by Firewall.
I can sent/receive messages not destinated to my mydomaine (IMP do not
accept message for ex. : from  me@mydoamine to me@mydomaine, or any
other user in "mydomaine".
The error I got is:
"There was an error sending your message - Tue Jan 9 20:24:48 2001"
Also, I can not sent correctly attached files. For a big file it do not
gives me the hand.
And for certains file there is a lot of errors which appeaars in the
window.
How I can solve these problems?

PS: I'm using IMP, Version 2.2.0-pre13


Thanks