Thank you for your reply. I tried that, but it didn't help.

By accident I happened to be looking through my address book and happened to
notice that the email addresses in the emails I was trying to send were also
in my address book. Upon eliminating the addresses in my address book, all
emails in question were sent out without any problems.

I don't know what the address book had to do with anything, but now that
those email addresses aren't in the address book, I can send out emails okay.
Thanks again for your help.

"PA Bear" wrote:

Disable email scanning by your anti-virus application. It provides no
additional protection and even Symantec says it's not necessary:

paste
Disabling Email Scanning does not leave you unprotected against viruses that
are distributed as email attachments. Norton AntiVirus Auto-Protect scans
incoming files as they are saved to your hard drive, including email and
email attachments. Email Scanning is just another layer on top of this. To
make sure that Auto-Protect is providing the maximum protection, keep
Auto-Protect enabled and run LiveUpdate regularly to ensure that you have
the most recent virus definitions.
/paste
http://service1.symantec.com/SUPPORT...02111812533106

Troubleshooting error messages that you receive when you are using OL and OE
http://support.microsoft.com/?kbid=813514

--
~Robear Dyer (PA Bear)
MS MVP-Windows (IE/OE, Shell/User, Security), Aumha.org VSOP, DTS-L.org

Need Help wrote:
Since I installed the latest security updates from Microsoft pertaining to
Outlook Express, I can't send out emails.

Using XP w/SP2.

- Did a telnet check and it was okay.
- Sent out emails from another computer (ME) using same email accounts and
that was okay.

The error message I get is:

An unknown error has occurred. Subject 'test', Account: 'ws4u Support',
Server: 'mail.emailbox10.com', Protocol: SMTP, Port: 25, Secure(SSL): No,
Error Number: 0x800CCC0B

Any help is appreciated.

Thank you,
Craig