I have been receiving a lot of spam with the sender ending in something like this: @kmfiadyzlf4ayelp.com
Setting up filters isn't working because the domain is constantly "randomized" i.e. never the same twice, except that there is always yelp.com after the random string.
I tried using @*yelp.com and *yelp.com but it's not working.
Question is, how can I filter messages where the sending domain is semi-random like this and never the same twice?