When your email or SMS credits hit zero while an automation is running, the message-sending steps pause — they are not cancelled. As soon as you top up, queued messages go out in order. Internal actions like tagging, list moves and internal alerts keep working normally, even with a zero balance, so the rest of the workflow continues without interruption.
What pauses, what keeps running
Only the actions that talk to a contact via email or SMS depend on credits. Add-a-tag, add-to-list and email-me-internal stay free and always run. This means an automation never breaks mid-flow — segmentation logic completes, internal owners still get notified, and only the outbound message waits for funds.
How to avoid running out
The cleanest fix is to switch on automatic credit recharge: set a threshold and a top-up amount, and Mailpro buys credits for you the moment your balance drops below that line. You can also buy credits manually at any time from your billing page, or rely on the credits rollover rules so unused monthly credits carry forward and absorb spikes.
What contacts see while you’re out
Nothing. They get the message the moment your balance is back. No partial sends, no bounced delivery attempts, no log of a "failed" automation. From the contact’s side, an automation that fires on Monday and gets sent on Wednesday looks identical to one that fired on Wednesday. For time-critical automations (birthdays, expiry reminders), automatic recharge is the safer setup.
Never run out mid-flow
Set up automatic credit recharge in a minute, check your email credit rates and SMS rates, or learn how unused credits roll over to your next month.
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