I get loads of emails in my junk folder from different domain address but all of them start with contact-(then a number here)@domain name.com. I block the domain names but I would like to block the sender name of contact- instead to stop these appearing in my email account.

The emails look as if they are from reputable companies (Match.com, for example) but when I click on the email them Sweep the email sender is contact-(number)@*******.com and I get about three or four of these supposed match.com emails but in each the domain name is different but still starts with contact-(number).

Please help