WEIRD SMTP PROBLEM IN OUTLOOK 2003

[Nicolas]

Hi everyone, I have a huge weird problem with my Outlook
2003 SMTP accounts:

I have 2 email accounts that were working fine in Outlook
2003 until a few days ago. I have no idea why.. but I
keep getting errors when sending email using any of my 2
servers. I am still able to send emails using my MSN
account, but it's not the same of course.

Can anyone help me?.

Thx a lot for taking a minute and helping me out.

Best,

Nicolas