@cfenollosa Thank you @cfenollosa for bringing this matter to general public. These big giants have made self-hosting email server horrible.
They tried their best to destroy GPG/PGP in email world. They ban your server if you disable plain smtp port 25 as they can't decrypt your traffic.
@cfenollosa 感谢@cfenollosa 将此事公之于众。这些大巨头让自托管电子邮件服务器变得可怕。
他们尽最大努力摧毁电子邮件世界中的 GPG/PGP。如果您禁用纯 smtp 端口 25，他们会禁止您的服务器，因为他们无法解密您的流量。