Many ISPs require that you be directly connected to their service (not
via another ISP, corporate LAN, etc.) in order to send via their SMTP
mail server. (They match your IP address against those owned by the
service.) An exception is made for messages being sent to recipients of
their service. The typical error message will be "Cannot Relay" or "Not
Local" or "Not Gateway", "Not Allowed Rcpthost" or something similar. A
workaround for this is to use the SMTP mail server of the service that
you connect via, but leave your other settings the same. And for some
mail services, the SMTP Authentication may be needed. In OE this is
specified in Tools, Accounts, Mail, Properties, Servers, Outgoing Mail
Server, My Server Requires Authentication.

--

Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm


"dk" wrote in message
...
I run windows XP with AVG Antivirus software that has the email
screening
portion of the program disabled. I have a news decoder program called
Yenc
shut down and, in OE, the server is correctly named in the
accounts/default
mail account/ properties folder. I recieve this error message and the
mail
remains in my outbox, when attempting to send email:
The message could not be sent because one of the recipients was
rejected by
the server. The rejected e-mail address was '.
Subject 'Test', Account: 'pop3.highstream.net', Server:
'smtp.highstream.net', Protocol: SMTP, Server Response: '553 sorry,
that
domain isn't in my list of allowed rcpthosts (#5.7.1)', Port: 25,
Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79
...appreciate any assistance.