Spam suddenly ramped up

[santafelady]

I have been getting a ton of messages that seem to get to me via an address similar to mine but with @newsletters-3.xyz at the end. How can I block this?

[ComcastCSAEmail]

We have noticed the uptick in emails from the domain as well and are currently blocking 99% of the emails they have sent to our servers so far. Out of the close to 1 million emails a small fraction appears to have gone to user inboxes - if you receive one in your inbox please mark the email as spam for our filter to learn more about the emails and help its accuracy in filtration. 

[santafelady]

Thank you, but they do go directly to my spam file. It's just that I get 25 a day, and it seems to have happened very suddenly. I was just wondering if there's a way to block them completely.