Problem
Some messages show Failed or stay in Processing, or the campaign sends less than expected.
Possible causes
- Invalid recipient addresses rejected at delivery time
- A mailbox hit an error mid-run and was skipped
- Limits reached — expected behaviour, not a fault
- A mailbox required attention during the run
- Recipients suppressed after the queue was built
How to check
- Campaign → Queue and filter by status.
- Open a failed message and read its recorded error.
- Email Accounts for mailbox-level errors.
How to fix
- Clean invalid addresses out of the list and re-verify future imports.
- Resolve the mailbox issue, then let the scheduler retry.
- Accept limit-driven pacing; add capacity if you need more.
When to contact support
Failures with no recorded reason, or messages stuck in Processing for hours.
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