To insert a hyperlink to the HTML message, click the Insert menu and select Hyperlink.
To create a hyperlink from existing message text, simply select the text before you create the hyperlink.
To edit an existing hyperlink, click within a hyperlink and choose Hyperlink from the Insert menu.

URL
The hyperlink of the URL. For example, "http://www.nesox.com".
Hint Text
The text for hint when the cursor is hovering on the hyperlink.
Type
Hyperlink type. For example, select "mailto:" type after entering "support@nesox.com"
for the URL.
Target
Target window to browse the hyperlink when your recipients clicks on it.