Can you remember or do you happen to know what site could that time work as an exchange with a similar name, using e-mail address to login ?
I remember that I was login in using my e-mail and password to purchase or send BTC to others using paysafe card.
That was around 2009-2010.
I'm 90% sure that it was BITCOIN.ORG but I may be mistaken.
Thanks for your reply anyway !