How do I validate email addresses before sending?

Updated Nov 2, 2026

Validation is optional and uses one validation per address. Importing never validates automatically.

Steps

  1. In Contacts, filter to the contacts you want to check, for example by their import tag.
  2. Select them, or use Select all … results.
  3. Open the menu (⋮) and choose Validate. You see how many contacts were accepted for validation.
  4. Filter by validation status to review the results.

Good to know

  • Your monthly allowance and its reset date are shown under My Plan. Contacts beyond your remaining validations are reported as not accepted.
  • Contacts marked invalid are skipped by campaigns.
  • Buy more with Buy credits under My Plan; purchased validations never expire.

More details in the FAQ

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

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