get your own domain name is my advice. But you have to tell everyone the new address and that is not so easy. Can you remember all the people, you have the sent e-mails maybe.

send individually - some spam checkers don't like round robins.

take yer time and hang on to the old e-mail address for a time.

I have two principle addresses plus a million on cresby.com - though most are redirected to nowhere because the spammers try every likely "name".