| Log entry | Meaning |
|---|---|
| Nov 18 19:03:20 ip-123-45-67-89 postfix/smtp[12345]: | A standard syslog prefix: date/time, server hostname, process name and id. In this case the process is the mail transfer agent. |
| 84A3744BC1: | Postfix Queue ID of the message |
| to=<recipient@sth.com>, | Who the email is sent to. |
| relay=none | Smtp mail relay. |
| delay=6000, | Total sending delay time in seconds. |
| delays= | Delay breakdown, quoting from the Postfix 2.3.19 release notes: |
| 5920/ | "Time before queue manager, including message transmission." |
| 0 .1/ | "Time in queue manager." |
80/
"Connection setup time including DNS,HELO and TLS."
0
"Message transmission time."
dsn: 4.4.1,
Delivery Status Notification: See this Internet Engineering Task Force Request for Comments for a list of status codes.
4.x.x means the email will be sent later, 2.x.x means everything is fine and 5.x.x indicates a definite failure.
status=deferred
Status of the message being sent, some other values are "sent" and "bounce"
Connect to address Network is unreachable
Error message.
