Plus Addressing (Sub-addressing)
A feature where mail to user+tag@domain is delivered to user@domain. Abusers exploit it to create unlimited apparent variants of a single inbox.
Why it matters for email security
Understanding plus addressing (sub-addressing) helps you build signup flows that resist fake accounts, disposable inboxes and automated abuse. VeriShield Edge operationalizes this signal as part of its transparent 0-100 fraud score.
Related concepts
Explore the full glossary or the domain directory to see these signals applied to real domains.