Activation mail not received

Hi, i've read the sticky post about the problem related to not receiving the activation mail and what the causes can be, but i still can't manage to receive it after i tried 5 different accounts with different mail domains (hotmail.com and gmail.com among them). Tried to register from different PCs connected to different ISPs, still nothing. I don't know what else to try to receive the mail (of course i checked all the obvious: spam, correct e-mail address, etc.).

Please let me know if there are alternative steps to solve the problem.
Thanks in advance.