Error sending emails with postfix CentOS

postfix.service - Postfix Mail Transport Agent Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled) Active: active (running) since Dom 2015-11-29 08:22:05 EST; 2s ago Process: 29710 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS) Process: 30051 ExecReload=/usr/sbin/postfix reload (code=exited, status=0/SUCCESS) Process: 29728 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS) Process: 29725 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS) Process: 29723 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS) Main PID: 29800 (master) CGroup: /system.slice/postfix.service ├─29800 /usr/libexec/postfix/master -w ├─29801 pickup -l -t unix -u ├─29802 qmgr -l -t unix -u ├─29803 trivial-rewrite -n rewrite -t unix -u ├─29804 error -t unix -u ├─29805 error -t unix -u ├─29806 bounce -z -n defer -t unix -u ├─29807 error -t unix -u ├─29808 bounce -z -n defer -t unix -u ├─29809 error -t unix -u ├─29810 bounce -z -n defer -t unix -u ├─29811 error -t unix -u ├─29812 bounce -z -n defer -t unix -u └─29813 error -t unix -u

postfix/error[29811]: 45B7140C20:, orig_to=<sendemail>, relay=none, delay=416, delays=415/0.11/0/0.03, dsn=4.0.0, status=SOFTBOUNCE (


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That says the status is a SOFTBOUNCE, which means it is normally a temporary issue. The three most common causes of those are:

  1. Mailbox is full (over quota).
  2. Recipient email server is down or offline.
  3. Email message is too large.

You might want to check your mailbox to see if it is full or over quota, or is the recipient email is accepting mail at this time.

Hope it helps, Jason Colyer DigitalOcean Platform Support Lead