Notes about the JMS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The JMS file type is primarily associated with 'SpamProx' by Dewqs' Tribes. File: FORBIDDEN.JMS. SpamProx is a mail proxy server. When the server sends an E-mail message, SpamProx analyzes it and tries to determine if it's spam.