解决 postfix 拒收邮件问题
sed -i 's/^smtpd_banner=.*/smtpd_banner=$myhostname ESMTP/' /etc/postfix/main.cf
sed -i 's/^smtpd_recipient_restrictions=.*/smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination/' /etc/postfix/main.cf
none
