Can't find addy to remove; recipient angry...

(MS WinXP Home SP2; MS Office XP; OE 6; IE 6; Dell Dimension XPS T450MHz Pentium III; 385MB RAM; AVG Free Version 7.5.503; spybot S&D; ad-aware; cable modem; WordPerfect8; Lexmark Laser printer "Optra E310")

Hi...for months a person asked me to remove his name from my list. I instantly removed it. But he again and again sends me all the msgs he still gets from me. And I again and again checked my list with the "find" function, and also name by name until my eyes went kaput and never found it.

Also checked all 3 of my YahooGroup lists and nothing. I even checked 2 other lists though totally irrelevant. He's getting very angry I'm afraid he may report me... I keep my computer free of malware, spies, virus, etc.

Any ideas where else I could search? Thanks ever so much. Adela