#IN QUEUE MEANING SOFTWARE#

Recently, when one of our customers reported mails stuck in Postfix, the reason attributed to Postfix configuration. The wrong configuration in Postfix also causes mails to be stuck in the queue. impact the Postfix mail delivery too.ДЇor the proper working, these mail filtering services should be working on the server. Likewise, other antivirus programs like Clamav, Amavis, etc.

#IN QUEUE MEANING SOFTWARE#

For example, in Postfix servers having MailScanner software scanning each email, problems appear when MailScanner stops. Similarly, we often see mail to be stuck in Postfix queue when the antivirus program fails to work correctly. As a result, the mails get stuck in the serverвЂ™s mail queue. (in reply to RCPT TO command))ДЄgain, certain servers send bounce messages back to the server. Similarly, when the recipient server see too many mails from the same server, it will block all mails from it.ДЄ sample entry in the serverвЂ™s mail log at /var/log/mailog appears as: May 10 03:36:13 pmxxx postfix/smtp: 48A6B1A7508: to=, relay=:25, delay=189560, delays=189ДҐ57/0/2.8/1.1, dsn=4.0.0, status=deferred (host said: 450-Requested mail action not taken: mailbox unavailable 450 Reject due to policy violations. When a spammer sends a large number of emails to non existing addresses, they fail and remain in the queue. Now, that we have an idea on Postfix mail queue, letвЂ™s check on the reasons that would make mail stuck in queue.ДЇrom our experience in server administration, our Support Engineers often see spamming as one of the major reasons for high mail queue.

Higher number of queued mails in the server indicate a problem on the Postfix server. To view the number of emails in Postfix email queue, we can use the command: mailqДЇor example, the output from a server having 4 mails in the queue with a total size of 19Kbytes will look as: ~]# mailq | tail -n 1 Therefore, at any point of time, the number of mails in the queue gives a quick status on the mail server. The Postfix mail server will retry sending the deferred queue mails on set intervals. Again, the Deferred queue hold the mails that has temporary failure. Pending queue contain mails that are not sent to remote server. Today, weвЂ™ll see how our Bobcares Engineers fix Postfix mail stuck in queue and make mail working.Д«efore proceeding further, letвЂ™s have a quick look and understand Postfix mail queue.Д«y default, Postfix maintains 2 mail queues, pending and deferred. In mails servers like Postfix, this can happen due to spamming, bad mail server configuration, etc.ДЄt Bobcares, we often address problems like Postfix mail stuck in queue as part of our Server Management Services. Often, mails get stuck in the mail server queue resulting in delayed or failed emails. Unfortunately, thatвЂ™s not the case every time. And, the mail reaches your friend in a split second. Perfect mail servers ensure lightening fast mail delivery.

In queue meaning