There are quite a few reasons for that, depending on your operating system
and the mail server you are using and whether or not you are using an
antivirus/antispam program to scan email. I'd suggest you review the
possible causes at these links:
http://www.google.com/search?hl=en&q... microsoft.com

If those are of no help, post back with more info about your operating
system, version of Outlook Express installed (check in Help/About for that
info) along with the info about whether or not you are using any antivirus
program or antispam program.
--
Jim Pickering, MVP/Windows Mail applications
Please reply ONLY to newsgroup.


"piperjim" wrote in message
...
When trying to send a message, usually to someone to whom I have never
emailed previously, it fails to send. I get an error message that the
"address isn't in my list of allowed recipients".

Thanks for your help & Merry Christmas,
Jim