Not Receiving AVG Serial Number

For some reason, I’m not receiving the 2nd email which contains the serial number for AVG in my gmail. I’ve registered twice already, both times I only received the first email containing the link to the download.

It can’t be that gmail is blocking out their email, right? especially since I managed to receive the first email. Any ideas what could be wrong? (note: it’s not that i’m impatient - I’ve waited for at least a week now)

on another note, is there any other free antivirus worth getting instead?