Blocking an IP address from sending you e-mail?

Rafagon

Genius
Gold
Dec 7, 2011
7,566
1,254
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Miami, Florida
#1
Since about 48 hours ago, someone has been sending me spam from my own e-mail address. I know my e-mail hasn't been broken into. Once I determine their IP address, how can I block them from e-mailing me further? This is happening on my me.com e-mail address. Additionally, can I block an entire top-level domain from e-mailing me? Is there any authority (besides Apple) that I can contact to persecute the offending party?