Why did my emails delivered drop in Reply.io?
The Reply.io help pages give 4 common reasons. The first to rule out: A bounce means the receiving mail server refused the email, so a rise in bounces can lower the number delivered.
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 bounce means the receiving mail server refused the email, so a rise in bounces can lower the number delivered.
In the Reply.io help:
A bounce is a receiving mail server refusing the message.
Email deliverability: how it works, read 2026-11-12.A newly added mailbox starts in a ramp-up period, so emails delivered from it can stay low at first.
In the Reply.io help:
Ramp-up mode is active for every newly added email account
Email deliverability: how it works, read 2026-11-12.Contacts on a blocked domain do not get emails even when they are in a sequence, so a longer block list can mean fewer emails delivered.
In the Reply.io help:
Even if you add contacts from blacklisted domains to a sequence, they will not receive your emails.
General settings, read 2026-11-12.Mailbox limits reset once a day, and Reply.io notes that stats can show wrong values when a sequence schedule runs past that reset.
In the Reply.io help:
The stats may show incorrect values if your sequence schedule is extended past this time.
General settings, read 2026-11-12.
How do I check it myself?
Compare bounced emails with emails delivered in your sequence stats. If bounces rose as deliveries fell, the drop can come from the addresses rather than the mailbox.
In the Reply.io help:
Number of bounced emails
Get stats for all sequences, read 2026-11-12.Look for contacts that were paused in your sequences. A paused contact does not get emails from the sequence, so many pauses can lower emails delivered.
In the Reply.io help:
This means that the contact does not receive emails from the sequence.
Contact statuses, 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 aren't my Reply.io replies being counted?Reply.io
- Why did my Reply.io sequence stop sending emails?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.