Feel Zhou: > Maybe I do not make it clear. My mail server is in China, But Hotmail > server or Gmail server,etc (for example )in Usa maybe reject ip (or ip > segment )from china. so ,if my mail server in China be bounced by them, I > want to use my other email server in USA to send the mail who is be > bounced. What can I setting the mail server in China. Thanks a lot.
/etc/postfix/master.cf: smtp unix - - n - - smtp -o soft_bounce=yes -o smtp_fallback_relay=backuphost.example.com With this, mail that is rejected by backuphost.example.com will stay in the queue until it is too old. Wietse