Cannot send email with Outlook Express

[Judy]

Newbie here...every attempt to send an email message via
Outlook Express 6.00.2600.0000 results in the same error
message: "The message could not be sent beause one of the
recipients was rejected by the server. The rejected email
address was (recipients e-mail). Account:
(e-mail address removed) Mail Account',
Server: 'smtpauth.earthlink.net", Protocol: SMTP, Server
Response: '550 relaying to (recipients e-mail address)
prohibited by administrator", port 25, Secure(SSL): No,
server Error: 550, Error Number: 0x800CCC79." This is a
single, non-networked computer using Earthlink as the
ISP. Wondering if it might be an Earthlink issue or are
there Administrator settings within Outlook Express that I
can explore? Any and all suggestions helpful. Thanks.

 

[Lanwench [MVP - Exchange]]

Hi, Judy -

Are you set up to authenticate with your SMTP server? You need to be using
the SMTP server of your ISP (whomever you're connected to the Internet
with).

Also note -

This is a group to support Outlook from the Office group of programs.
Outlook Express is a part of Internet Explorer and is a quite different
program, despite its similar name..

You will probably get a faster and more expert answer if you post this to an
Outlook Express news group.

Try posting in one of these newsgroups:
microsoft.public.windows.inetexplorer.ie5.outlookexpress for OE 5.x
microsoft.public.windows.inetexplorer.ie55.outlookexpress for OE 5.5x
microsoft.public.windows.inetexplorer.ie6_outlookexpress for OE 6.x
microsoft.public.internet.outlookexpress.mac for OE for Macintosh

If those groups aren't carried on the news server that's carrying this group
try using msnews.microsoft.com (MS's public news server that's the source
for all the microsoft.public newsgroups).

A good website for information on OE is:
http://www.tomsterdam.com/