GroupMail message file
File type: Document file
A .gmx file is a message file created by GroupMail.
It belongs to GroupMail, a Microsoft Windows application for sending group emails and newsletters.
File type category:
Document file
Date updated: October 6, 2026
The gmx file extension identifies message files used by GroupMail. GroupMail is software for Microsoft Windows that allows users to send group emails and newsletters.
A .gmx file stores a message created in GroupMail and can be opened as part of that application's workflow.
Open a .gmx file with GroupMail on Microsoft Windows. The file is intended to be read and used within GroupMail.
No specific conversion method is known for .gmx files. If GroupMail provides an export function, use it to save the message in another suitable format.
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