postfix - smtps - 拒绝从邮件客户端发信 - HELO command rejected: need fully-qualified hostname

问题：配置了tls的postfix，dovecot。邮件客户端雷鸟能正常通过587端口发信，但foxmail使用465端口发信时提示拒绝。如，reject: RCPT from unknown[]: 504 5.5.2 : Helo command rejected: need fully-qualified hostname

尝试：可以在postfix中配置文件main.cf中，先允许通过sasl验证过的用户发信，如：mua_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_hostname, reject_invalid_hostname, permit

参考：https://serverfault.com/questions/499672/noqueue-reject-helo-command-rejected-need-fully-qualified-hostname/499811