Regarding e-mail that used for SEGA ID

Ok this might ridiculous..but i seem to forgot the e-mail that i used for my SEGA ID.

i have a lot of alternate email (for work, collage, friend etc) but not every e-mail (user n pass for the e-mail) is saved on notepad or i could remember it. i'm only have the user e-mail information for friends and work related.

well, i still could play on my PC though. But everytime when i'm out and wanted to play on laptop it'll always ask for verification code and (of course) it'll go to my SEGA ID e-mail.

So, can i change my SEGA ID e-mail? and how to change it?

or for the better, is there any way for me to know what e-mail that i used for my SEGA ID so maybe i could try remember the pass of that e-mail or reset the pass.

thanks.