Why did my Reply.io sequence stop sending emails?
The Reply.io help pages give 3 common reasons. The first to rule out: A sequence that was paused, archived or never launched gives no new emails.
Is it broken, or just quiet?
A number can fall because fewer people came, or because something stopped counting them. Below are the causes the Reply.io help pages give, and how to check each one yourself.
What causes it?
A sequence that was paused, archived or never launched gives no new emails.
In the Reply.io help:
Gray means it was never launched, was paused, or was archived.
Why is a campaign not running?, read 2026-11-12.Once every contact has finished, replied or left the sequence, there is no one left to email.
In the Reply.io help:
Blue toggle: everyone finished, replied, or otherwise left the active pool.
Why is a campaign not running?, read 2026-11-12.If your email provider blocks a mailbox, Reply.io can pause that mailbox on its own to avoid many bounces.
In the Reply.io help:
The provider blocked that account, and Reply's auto-stop paused sending from it to prevent a wave of bounces.
Why is a campaign not running?, read 2026-11-12.
How do I check it myself?
Look for an error notice on the sequence, which appears when contacts have no sending account.
In the Reply.io help:
An error notification appears over the toggle when contacts are left unassigned
How Reply selects a sending mailbox, read 2026-11-12.After a pause for bounces, check your contact list so the same pause does not come back.
In the Reply.io help:
Validate your list, or the same suspension will repeat.
Why is a campaign not running?, read 2026-11-12.After a fix, confirm that contacts advance again and deliveries pick back up.
In the Reply.io help:
Confirm contacts advance in the People tab and deliveries resume in the Stats tab.
Why is a campaign not running?, read 2026-11-12.
How would I know the day it starts?
- Feder reads your emails delivered from Reply.io each day and compares each day with your own history.
- It tells you when emails delivered go quiet or move outside their usual range.
Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.
See what Feder reads from Reply.io, which feeds Reach. Feder only reads. It never changes anything in Reply.io.
What else goes wrong with these numbers?
- Why did my emails delivered drop in Reply.io?Reply.io
- Why aren't my Reply.io replies being counted?Reply.io
- Why did Google Analytics stop collecting data?Google Analytics
- Why aren't my key events showing in Google Analytics?Google Analytics
- Why does Google Analytics show (not set)?Google Analytics
See every question.
Where do these answers come from?
Every cause and check on this page comes from the Reply.io help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.