Tired of Being Hijacked

Honestly, I don't know what to do about this but it is driving me completely batshit insane. I'm sure there's a technical term for what is being done to my konagod dot com email account. I just call it hijacking by some asshole for sending out thousands of spam emails. Most of them kick back into my in-box as blocked and undeliverable.

I just deleted over a thousand of these nasty buggers from overnight.

I think I need to pay a visit to the host of my domain and check out some settings.