Postfix Log Parser
Group Postfix log lines by queue ID and read their key=value fields — sender, recipient, relay, DSN, and status — entirely in your browser.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Avoid live production secrets; use dummy or masked data where possible. Data handling details
Summary
Transactions
Lines
How it works
Paste Postfix log lines, one per line, including the syslog header (`Aug 31 12:30:45 host postfix/smtpd[1234]: …`). Lines that share a queue ID are grouped into one transaction so a delivery can be read end to end. The `key=value` fields Postfix writes — client, from, to, size, nrcpt, relay, delay, dsn, status — are read as written, and the `status=` text including its bracketed SMTP reply is shown unchanged. NOQUEUE lines are listed separately, because they have no queue ID by definition. A word Postfix writes where a queue ID would go (warning, fatal, panic, error, statistics, timeout, table) is not read as a queue ID. The syslog timestamp carries no year and no time zone, so no absolute time is shown for it. The tool never classifies a message as spam, never attributes a cause, and never predicts whether a deferred message will be delivered. Input is capped at 400,000 characters and 2,000 lines. Everything runs locally; nothing is uploaded, stored, or written into the URL.