Hi! I'm a newcomer in Ubuntu world. While registering in this forum, I did not get the activation mail in the first attempt ( a whole day is past by now). So I registered with a different name and using an another mailing address. But actually, I'm going to close this mail account and would like to use the e-mail from my first attempt. At the present, I can not do this as while trying to change the e-mail in my profile, I receive a message that the mail address is already in use. What should I to do to be able to start using the desired mail?