Depending on what email client you use, you should be able to set up a filter that automatically sends these emails to junk and deletes them.

I have some filters that do that by address and some filters that do it by subject or body of the email.  For example, if in the subject line the word "save" exists it goes into the junk folder or if the word "deal" is in the body.  Takes a few minutes to set up but then you're rid of a lot of emails from then on.