remove mail.com from the suggested domain list?

[ferreiro]

when trying to verify an email like jorge@mask.io (one of zootools customers) they got suggested to use mail.com instead

i suspect there will be more cases like this.

i saw and looks like mail.com is not super popular nowadays, not even in this top 10 list: https://www.litmus.com/email-client-market-share/

prob we should remove it. open to feedback