Please tell me what this junk is on my son's phone--kindnsasse@fastmail.fm, don't start with this, it's funky to,  it's just a useable void email.

This call comes in as "familyfoot" which is numerically 326-459-3668. It is a prank call, no one is at the end of the line. Lately, they have been coming in almost every day, sometimes a few times a day and it shows up on my caller id. I tried to block it by using *60, that won`t work. I tried to re-dial it using *69 and that doesn`t work either. Does any one have any ideas? I also get the 000-012-3456, but every one by now knows that that is a skype call.