For more information, please visit the following pages:

• Postbox
• macOS
• Postbox, Inc.
• Gecko

Latest user agents:

• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:7.0.1) Gecko/20171012 Postbox/5.0.20
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:7.0.1) Gecko/20151105 Postbox/4.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:7.0.1) Gecko/20151105 Postbox/4.0.8