I'm trying to change to my account email to an email alias through SimpleLogin for better online security, however, it throws an error saying the address can't be used. I read in previous posts there's a blacklist of domains to cut down on spam which I'm assuming simplelogin.com is included in. Do I have any recourse? Would it be possible to give an admin the custom domain I have within simplelogin to whitelist? Thank you for any assistance.