LanguageSU?
Standard mail archive file
File type: Archive and compressed file
An su? file extension is related to the standard mail archive format. Probably obsolete format.
What is su? file?
File type category:
Archive and compressed file
Date updated: January 8, 2019
The su? file extension is used for Standard mail archive.
The su? file contains compressed mail message and attachments.
Most likely some old format without support. No further information could be found.
Suggested software to open su? file:
Associated software actions with the su? file
Software applications that handle other tasks involving su? files:
FastEcho (Microsoft Windows)