[quote user="djmeydey"] Is there any possibility to use html in outgoing e-mails? [/quote]
Pegasus will automatically send emails in HTML if you include any formatting or hyperlinks, images etc when composing the message, provided the "Disable all text styling options (never send styled mail)" option in the "Message formatting" tab of the Tools -> Options... dialogue is unchecked.
I think if you check the "Rich text" box in the top of the composer window it will also send the message in HTML. Inserting formatting etc as described above will automatically check this box if it isn't already checked.
It also helps if you ensure the "Do not display the editor 'styles' toolbar" option, in the same tab is also unchecked. However even if the styles toolbar is hidden you can still do formatting using accelerator keys, eg control/B for bold etc.
You should also make sure that "Generate multipart/alternative versions of richtext messages" is checked in the "Sending mail" tab of Tools -> Options... Otherwise, your formatted messages will be sent in HTML only, rather than with alternative plain text and HTML parts. The former is not considered good practice, and HTML-only messages may be rejected in some quarters.
See the help texts for the two Tools -> Options... tabs for more information.