#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.
@cm @antekone Speaking of GMail's IPv6 support: even with perfectly configured IPv6 FCrDNS, DMARC, SPF, DKIM, ADSP, etc., Google keeps randomly rejecting e-mail sent using IPv6. Only option: force all outbound e-mail aimed at Google to be sent to a hard-coded IPv4 GMail inbound relay, overriding their DNS. Very clean & convenient... 😕
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