#GMail is harmful to e-mail ecosystem; its antispam blocking policy matches too many valid messages as spam.
It blocked LastPass email leak warning email, because it contained "a link" to a leaked site.
It blocked an e-mail from goverment agency addressed directly to me.
It discriminates all non-gmail servers, and it's pretty much impossible to own a private SMTP server these days, because GMail will classify everything as spam.
It's not how e-mail should work.
Consider dropping GMail.
@kicou @antekone that an important point. #Microsoft is actually worse than Google, as MS blanket rejects all dynamic IPs, whereas Google is hit-&-miss (or least that was the case back before I started a full on boycott of both)