This might not be for everyone, but to discourage users from using popular temporary email services, I have started a list that can be added to XenForo's "Banned Email Addresses" section. Maybe you can help me build this list if I have missed a service? Code: *@*.mintemail.com *@binkmail.com *@bobmail.info *@guerrillamail*.com *@lhsdv.com *@mailinator*.* *@mailinator.* *@safetymail.info *@sogetthis.com *@spamherelots.com *@suremail.info *@thisisnotmyrealemail.com *@yopmail.com *@zippymail.info Hopefully these can be of some use. Edit: Added addresses up to post #3. Thanks dmnkhhn & g0rn.