Environment variables are used for very specific feature capabilities and may be deprecated within versions and migrated to system configuration settings.

Environment Variable	Setting / Description
NOIPSICON	Value: Any Set to any value disables the animation icon in the system tray
IPSHERALDSMTP	Value: computer name or FQDN Sets the SMTP herald value (EHLO/HELO SMTP command)
IPSNOMESSAGEID	Value: Any Does not generate a unique message id during SMTP message send and relies on the relay server to generate.
IPSNOFALLBACK	Value: Any If the specified login fails, ipSentry will not fallback to current credentials for Windows login attempt.
IPSIIS5UID	Value: Any Strips non Number/Alpha characters from the MUID during report generation.
IPSNOTCPTERMINATECOMMAND	Value: Any Will cause ipSentry to skip termination command on SMTP, NNTP, and FTP monitoring
SMTPTIMEOUT	Value: Timeout in Seconds Override the SMTP email timeout (default = 60)