Klitzing qmail log

A blast from the past!

Klitzing qmail is a variant of the popular qmail mail transfer agent (MTA) developed by Dan Bernstein. The "klitzing" part refers to the fact that the author, Arnt Gulbrandsen, is a Norwegian who uses the nickname "Klitzing" (which is a Norwegian word for "clipping" or "cutting").

The qmail log format is similar to other Unix mail logs, but with some additional fields specific to qmail. Here's a breakdown of the typical fields you'll see in a qmail log:

  1. date: The date and time the message was received or sent.
  2. remote: The IP address of the remote host that sent or received the message.
  3. local: The IP address of the local host that sent or received the message.
  4. sender: The sender's email address.
  5. recipient: The recipient's email address.
  6. status: A status code indicating the outcome of the message delivery (e.g., 250 for successful delivery, 550 for rejection, etc.).
  7. reason: A brief reason for the status code (e.g., "User unknown" for a 550 status code).
  8. size: The size of the message in bytes.
  9. id: A unique identifier for the message.

Here's an example of a qmail log entry:

2023-02-20 14:30:00 klitzing qmail-1.03: remote=192.0.2.1 local=192.0.2.2 [email protected] [email protected] status=250 reason=OK size=1024 id=1234567890

In this example, the message was received from IP address 192.0.2.1 and sent to IP address 192.0.2.2. The sender's email address is [email protected], the recipient's email address is [email protected], and the message was successfully delivered (status code 250). The message size is 1024 bytes, and the unique identifier is 1234567890.