有一句话要说在前头：“Linux配置速成，从入门到跳楼一步走”
很绝望，我去Google了一圈，都没有找到解决方法，还是我自己乱**试出来的。
我不想说话，只是默默的贴上配置。
依次遇到的错误：“Mail content denied”，“dovecot: auth: Fatal: No passdbs specified in configuration file. PLAIN mechanism needs one”，“ dovecot: imap-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 0 secs)”，“dovecot: imap(root): Error: Invalid settings in userdb: userdb returned 0 as uid”，“dovecot: imap(root): Error: Invalid user settings. Refer to server log for more information.”，“error: open database /etc/postfix/vmaps.txt.db: No such file or directory”，“postfix/trivial-rewrite[13636]: error: open file /etc/postfix/vhosts.txt: No such file or directory”，“Temporary lookup failure”
特别是下面这几个，弄了几百年才弄好：
“fatal: no SASL authentication mechanisms”，“ warning: SASL: Connect to private/auth failed: No such file or directory”，“Recipient address rejected: User unknown in local recipient table”，“Relay access denied”…
