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Postbox

Postbox is a desktop email client, news client, and feed reader for Windows and macOS, developed by Postbox, Inc. It was launched in 2008 and acquired by eM Client in 2024, after which it was discontinued.
Latest: 7.0.56
Last checked: Mar 2, 2026 8:57pm
Rank: 2838/15140
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Overview

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License: ProprietaryWinget: Available
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Version & Lifecycle

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Current: 7.0.56 N-2: 7.0.52 Oldest supported: 1.0 (September 9, 2008) Predicted EOL: 2024-10-24 Avg cadence: Every 31 days

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email client news client feed reader Windows macOS proprietary

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  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

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postbox

Notes

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Postbox was built using Mozilla's Gecko engine and initially based on Thunderbird. It supports IMAP, POP3, SMTP, RSS, newsgroups, and extensive filtering rules. The product was discontinued after acquisition by eM Client in October 2024.

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