host ] said: 554 5.7.1 : Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (58-246-222-157) (in reply to RCPT TO command)
下面是解决办法：
HELO 检测。去 /etc/postfix/helo_access.pcre 里加个白名单。
/^out\d{1,3}-\d{1,3}-\d{1,3}-\d{1,3}\.mail\.qq\.com$/ OK