Topic on Project:Support desk

Hello all, I would like to know how can I look user's email provided during registration?

Unless you have database access, you can't. That information is private.

I do have database access ) and wonder if sysop can access it using some mediawiki tool

There's Extension:WikiUserInfo which could do it, but its code is rather old. Use at your own risk. Regards.

I also found this extension: Extension:LookupUser which can help me probably

Probably better, yes. Regards.