How do I use spintax in email campaigns?

Updated Nov 2, 2026

Spintax lists alternatives in curly braces separated by a vertical bar, for example {Hi|Hello|Hey}. MailRush picks one at random for each email.

Steps

  1. Type the alternatives in the subject or body, for example {Hi|Hello} {{first_name}},.
  2. To have a version suggested, open Spintax AI and choose Spintax Subject or Spintax Body, review the result and click Apply.
  3. Click Preview and Regenerate Preview to see several variations.

Rules

  • Groups can be nested: {Hi|{Hello|Hey} there}.
  • Spaces at the start and end of each option are removed, so put spaces outside the braces.
  • Only braces that contain a vertical bar are treated as spintax.
  • Emails sent through the API are sent without spintax.

More details in the FAQ

The FAQ is in the MailRush.io app under Support (sign-in required).

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