Hello, first post,

I tried to register with my kraut Microsoft E-Mail (outlook.de) that one didn't work and therefore I had to stick with my lesser used Google E-Mail (gmail.com). Unless there's some kind of reasoning behind that, the most common TLDs ought to be covered by the whitelist.

 

Whitelisting isn't based on tld, rather the email host at a domain/subdomain level. I won't be adding all ".de" domains to the whitelist, for example. 

 

Most regional versions of popular hosts are added but as you found, some of the lesser used regional versions are not. Next time I'm poking around the code I'll add it to the list.