Garek

you have spoken of using a Webmail account, logging on and having no problem sending HTML/RTF files using it.

Then you tell us you are using the same Webmail account via Outlook and having problems.

Is this Webmail account one of the well know services like Hotmail, MSN, Yahoo or GMail or is it just a regular ISP POP3/SMTP account that also allows you log in via a Web interface?

If it is one of the “well known” services then please tell us how you wre accessing the account from Outlook.