Gmail has a nice feature to repeatedly beta-test email sending from a web appliation that requires account creation without having to repeatedly delete the accounts you might have to create to retest. Enter the emails in the following format:

myname+1@gmail.com
myname+2@gmail.com
myname+3@gmail.com

Gmail will automatically strip out the “+1” or the “+2” or the “+3”  and resolve the email address to myname@gmail.com. This also works for email domains hosted with Google Apps for Business.

So you do not have to use a bunch of aliases, groups, forwarders or tedious beta-test email accounts.