Please note: This is mainly for when you're doing unregistered emails, and aren't very great with using proxies.
Sadly, I cannot remember the limit per email. It is either 4 or 5 alias'.
Once you have signed onto your desired email:
This may or may not help you.
It has surely helped me out in the past,
and I hope it does the same for others.
I know there aren't many people selling unreg. emails
But since some do, this could be helpful.
(wasn't sure where to put this guide!)