IF so, and you get a message in your incoming mail from someone 'strange' or a bulk mail w/the first addressee Not YOU? First just 'rest' on the message, then,Go to the top blue bar to 'messages' & click on Block message. It'll take about 30-60 seconds to block-then it'll ask you to delete. Do so.
THEN go to your 'deleted messages' and repeat the same.
ANY E-MAILS from THAT particular address will be forever blocked! Just don't open any new ones! You could open yourself to 'cookies' that you do not want or worse.
I've got a VERY long list in my 'blocked address' file!
Some internet providers also provide services when a customer is barraged by such junk mail. I've found it harder to do than simply blocking 'em tho,
Good luck!