Joshtronic • 7/19/2026

Invite Systems are an Open Relay

This article discusses the vulnerability of invite systems in software platforms, which can be exploited by spammers to send unsolicited emails by manipulating organization names and bypassing invite limits. The author compares this to an open mail relay and offers strategies to mitigate abuse, such as capping pending invites, setting daily limits, and monitoring for suspicious activity. The content is directly relevant to software development and IT security best practices.

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#Rate Limiting #Spam Prevention #Invite System Security