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This module
XOOPS Bot Signup Protection 1.04 will prevent a robot spaming device from signing up to your website.
I wouldn't suggest adding $info^ to the email just the domain similarily as the other domains otherwise users from the .info email exchange will not be able to signup.
I had him key several username on my system as well under newiz000000 etc, with the same domain, he is scanning the XOOPS domain for spam sources.
I think we should have his phishing websites banned and his domains cancelled, the .info boys are real #OOPS#s, if anyone does that with there domains and you report it to there website they general can it.