What is Gmail Plus Addressing (RFC 5233 Subaddressing)?
Gmail Plus Addressing, formally standardized by the Internet Engineering Task Force in RFC 5233, allows you to append a plus sign (+) followed by any combination of letters, numbers, or tags to your username before the @ symbol. Google Mail dynamically routes all incoming traffic directly to your main inbox while preserving the tag for filter rules.
[email protected] → Tag: "newsletter"
[email protected] → Tag: "banking"
[email protected] → Tag: "trial2026"
[email protected] → Tag: "urgent.vip"Why Plus Addressing is Essential for Modern Email Users
Unlike the Gmail dot trick which creates variations by shifting period placements, plus addressing provides infinite, semantic tag naming. Key benefits include:
- Instant Category Segregation: Create memorable tags for subscriptions (
+news), ecommerce receipts (+shop), or software testing (+dev). Explore all advantages in our benefits of the plus trick article. - Leak and Breach Detection: By signing up on a website with
[email protected], you can immediately identify the source of spam if marketing emails arrive addressing that specific tag. Read our full guide on tracking email leaks with aliases. - One-Click Filter Automation: In Gmail Settings > Filters, simply create a rule matching
to:([email protected])to auto-archive, star, or assign a dedicated folder. See how to set up Gmail filters with aliases.
Valid Characters & Syntax Rules
RFC standards allow alphanumeric characters, hyphens, and periods inside the plus tag portion of the email. However, you should avoid spaces and special symbols like quotes or brackets. For a deep dive into character encoding, read our guide on the plus sign in email addresses.
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