Hello {recipient},

I have been using {sitename}, a communication, collaboration
 and information sharing web service.

It offers a direct connection to Skype's VOIP phone service,
 and I would like to use it to phone you. 
 
Do you have a Skype account?

If yes, you can register for free on {sitename} and add your
 skypename here: {updatelink}.

If you do not have Skype Account, you can download it on {sitename}
 or you can download skype here: {downloadlink}.
 (You will need a VOIP phone, or headset, connected to your computer) 

<mask>

Thank you,
{sendername}