Why is my campaign not sending?

Updated Nov 2, 2026

Look first at the status badge under the campaign name in Campaigns; hover over it for details.

The campaign did not start

"Campaign not ready: no tags assigned." Add tags with the person icon (Manage campaign tags and contacts).
"Campaign not ready: no contacts in assigned tags." Add contacts to those tags.
"Campaign not ready: no sequences assigned." Write and save the sequence.
"Campaign not ready: no SMTP account assigned." Choose the Email Sender and save the sequence.
"SMTP validation failed…" or "IMAP validation failed…" The sender's login failed; run Test authentication in Email Accounts.
"Campaign sequence configuration requires review" Open a support ticket.

Starts in … or Waiting for schedule: outside the sending days and hours.
Sender hourly limit or Sender daily limit: the sender used its allowance on other email; sending resumes automatically. "Sending" with "Account limit · 100/hour" is normal pacing.
Next follow-up in …: first emails are done and follow-ups are waiting for their wait time.
All emails sent: every recipient received the whole sequence or stopped early under the Stop Strategy.
The campaign reached its Daily Sending Limit for today (25 on new campaigns), or your plan's daily total is used up.

"… not emailed" under Recipients means those contacts are unsubscribed or marked invalid.
Sending to a recipient provider can pause after spam, blocklist or high-bounce reports. Check Sending restrictions on the Feedback Loop page.

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

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