These are common throw away email domains used by spammers. I made a small project that checks this list against new users.
–#Banned
- @uikd.com
- @Guerrillamail.com
- @my10minutemail.com
- @drdrb.com
- @mailinator.com
- @meltmail.com
- @dayrep.com
- @harikirimail.com
–#Banned