From time to time the mail queue may get filled up. This may be due to network problems or misconfiguration. For instance, if you botch (typo) the relayhost parameter, the mail will be undeliverable. The first thing to do is fix the problem, meaning get the network back online, or fix the configuration.

1. try and deliver the mail from the queue(強(qiáng)制發(fā)送隊(duì)列中的郵件):

$ postfix flush or $ postqueue -f

2. check mail queue size (查看隊(duì)列大小):

$ mailq | wc -l

3. list mails in queue (查看隊(duì)列中的郵件)：

$ postqueue -p or $ mailq

4.put all deferred mail “on hold” so that no attempt is made to deliver it(暫緩發(fā)送隊(duì)列中的問(wèn)題郵件):

$ postsuper -h ALL deferred

5. release mail that was put “on hold”(解除暫緩發(fā)送):

$ postsuper -H ALL deferred

6. purge all deferred emails from the queue without delivering (刪除隊(duì)列中問(wèn)題的郵件):

$ postsuper -d ALL deferred $ find /var/spool/postfix/deferred -type f -exec rm -vf {} \;

7. purge specific email from the queue by specifying its message ID (按郵件ID刪除隊(duì)列中的郵件):

$ postsuper -d 0C0FF240F2

8. 刪除已經(jīng)三天未發(fā)出的郵件

$ find /var/spool/postfix/deferred -type f -mtime +3 -exec rm -f {} \;

9. 列出所有問(wèn)題郵件

$ find /var/spool/postfix/deferred -type f \ -exec ls -l --time-style=+%Y-%m-%d_%H:%M:%S {} \;

10. 刪除超過(guò)5天的問(wèn)題郵件的退信記錄

$ find /var/spool/postfix/defer -type f -mtime +5 -exec rm -f {} \;

11. 復(fù)雜用法：利用grep得到特定的郵件ID，再刪除，如：

$ mailq | grep -B 1 "Hotconcerts@gmail.com" | cut -f 1 -d ! > deletionIDs" $ cat deletionIDs | postsuper -d -