This line is announcing the version of Html being used to compose the message. It is quite normal. If you are seeing it, you need to click the button called View and switch to fancy view of the message. If your webmail client is having problems that is another story, as any webmail client must be able to read html.

After composing and sending a pegasus email message, when reading that message in some versions of webmail, the message is preceded by this line:

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Then the text of my message.

Any ideas?

Ver 4.52 by the way

This line is announcing the version of Html being used to compose the message. It is quite normal. If you are seeing it, you need to click the button called View and switch to fancy view of the message.