I wanted to make a cool signature in Gmayl. Decided instead of the usual representation of the mailbox account, Skype and Twitter to put pictures of the logos that would have in a "proper" link.
With gmayl and Twitter no problems, everything works.
There were difficulties with Skype. Sew the link skype:SkypeUser?call not working, the browser does not "see" the links in the picture.
Can someone tell me whether it is possible in principle to do it, and if so, how?