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📖 NAME

postcat - show Postfix queue file contents

🚀 Quick Reference

Use Case	Command	Description
📄 View full queue file (envelope + headers + body)	postcat file	Default behavior (equivalent to -beh)
🔍 View only envelope	postcat -e file	Show message envelope content
📋 View only headers	postcat -h file	Show headers up to first non-header line
📝 View only body	postcat -b file	Show body from first non-header line onward
🔢 Print record types	postcat -d file	Print decimal type of each record
📍 Print record offsets	postcat -o file	Print queue file offset of each record
🔎 Search queue by name	postcat -q filename	Search Postfix queue for named files
🐞 Debug with verbose logging	postcat -v file	Enable verbose logging (multiple -v for more)
📂 Read from stdin	cat file | postcat	Read queue file from standard input

📋 SYNOPSIS

postcat [-bdehnoqv] [-c config_dir] [files...]

📝 DESCRIPTION

The postcat(1) command prints the contents of the named files in human-readable form. The files are expected to be in Postfix queue file format. If no files are specified on the command line, the program reads from standard input.

By default, postcat(1) shows the envelope and message content, as if the options -beh were specified. To view message content only, specify -bh (Postfix 2.7 and later).

⚙️ Options

• -b — Show body content. Starts producing output at the first non-header line, and stops when the end of the message is reached. (Postfix 2.7+)
• -c config_dir — Use specified directory for main.cf instead of default.
• -d — Print the decimal type of each record.
• -e — Show message envelope content. (Postfix 2.7+)
• -h — Show message header content. Produces output from beginning of message up to, but not including, the first non-header line. (Postfix 2.7+)
• -o — Print the queue file offset of each record.
• -q — Search the Postfix queue for the named files instead of taking the names literally. (Postfix 2.0+)
• -v — Enable verbose logging for debugging. Multiple -v options increase verbosity.

🔍 DIAGNOSTICS

Problems are reported to the standard error stream.

🌐 ENVIRONMENT

• MAIL_CONFIG — Directory with Postfix configuration files.

⚙️ CONFIGURATION PARAMETERS

The following main.cf parameters are especially relevant to this program. The text below provides only a parameter summary. See postconf(5) for more details including examples.

• config_directory (see postconf -d output) — Default location of Postfix main.cf and master.cf configuration files.
• import_environment (see postconf -d output) — List of environment parameters a privileged Postfix process will import from a non-Postfix parent process, or name=value environment overrides.
• queue_directory (see postconf -d output) — Location of the Postfix top-level queue directory.

📁 FILES

• /var/spool/postfix — Postfix queue directory

📚 SEE ALSO

• postconf(5), Postfix configuration

📜 LICENSE

The Secure Mailer license must be distributed with this software.

👤 AUTHOR(S)

Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA

Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA

📖 NAME 🚀 Quick Reference 📋 SYNOPSIS 📝 DESCRIPTION 🔍 DIAGNOSTICS 🌐 ENVIRONMENT ⚙️ CONFIGURATION PARAMETERS 📁 FILES 📚 SEE ALSO 📜 LICENSE 👤 AUTHOR(S)