Linux mail Server (Postfix+dovecot) (iii) Post mail with Maildrop16. Configure Postfix to deliver mail using MaildropMaildrop is a filtering-capable mail delivery agent written in C + + that replaces local MDA and is one of the courier messaging system components. It accepts the information from the standard input and posts it to the user's mailbox; Maildrop can either post the message to the mailboxes format mailbox or post it to the Maildirs format
Article Title: Views on the basic usage of maildrop. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Recently, I have seen some people in the forum specifically ask about maildrop usage, and I am also very concerned about Email filtering. I will write out some of my thou
File cleanup A server disk space alarm was reported recently. During the troubleshooting process, it was found that many small files had been accumulated under the "/var/spool/Postfix/maildrop" directory and wanted to be deleted directly at first, however, when you use RM to delete a file, the following message is displayed: "The parameter list is too long." Later, Rsync is used to identify the junk file: # Create a temporary space-time folder mkdir/
/var/spool/postfix/maildrop too many small files cause Inode index to be used up to a workaroundProblem Performance and check:1. Run df-i/view inode usage full;2. Check whether/var/spool/postfix/maildrop has very many small files, LS direct card death situation;Solve:1.cd/var/spool/postfix/maildrop; LS | Xargs RM-RF;2.vi/etc/crontab: Replace ' mailto=root ' with
/var/spool/postfix/maildrop the file backlog in the directory, resulting in insufficient disk space
The analysis found that the files in the/var/spool/postfix/maildrop directory are mainly produced by Crond, after the Crond configuration file is modified to mailto= "", and after the Crond service is restarted, there is still a file backlog under the Maildrop dir
Found/var/spool/postfix/maildrop This directory occupies more than 10G of space, the Internet to find the same problem, the reason is:Since Linux executes cron, the output and warning information in cron execution scripts will be sent to the Cron owner in the form of a message, and the mail is not sent successfully because SendMail and postfix in the customer's environment are not working properly. All the small files accumulate under the
Summary
There is no special service running on the host, so no monitoring alarm is added. This sudden execution of a command cannot be realized because the disk is slow. The error was found because the directory was /var/spool/postfix/mailfdrop too large to cause.
By understanding the discovery because:由于 Linux 在执行 cron 时,会将 cron 执行脚本中的 output 和 warning 信息,都会以邮件的形式发送 cron 所有者, 而由于客户环境中的 sendmail 和 postfix 没有正常运行,导致邮件发送不成功,全部小文件堆积在了 maildrop
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