Why is my Smartlead campaign sending fewer emails?
The Smartlead.ai help pages give 4 common reasons. The first to rule out: Your email provider can cap how much an account sends, and Smartlead shows an error when that cap is reached.
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 Smartlead.ai help pages give, and how to check each one yourself.
What causes it?
Your email provider can cap how much an account sends, and Smartlead shows an error when that cap is reached.
In the Smartlead.ai help:
This error appears when your email account hits a sending limit set by your email provider.
Troubleshooting "Sending Quota Exceeded" Error, read 2026-11-12.An email account used by several campaigns shares one daily limit between them, so adding a campaign can lower what each one sends.
In the Smartlead.ai help:
The daily limit is being split across the 4 campaigns and you can't expect all 4 campaigns to send 40 each.
My campaign is not sending emails or sending less volume, read 2026-11-12.If an email account must wait longer between emails than the campaign expects, fewer emails go out in a day.
In the Smartlead.ai help:
In this scenario, the minimum time gap at the email account level is greater than the frequency set at the campaign level.
My campaign is not sending emails or sending less volume, read 2026-11-12.An email account can be disconnected when its password or sign-in permission changes or runs out.
In the Smartlead.ai help:
Password or 2FA changed, OAuth token expired or revoked
Understanding Email Account Disconnection Reasons in Smartlead, read 2026-11-12.
How do I check it myself?
Compare the same date range each time you look at emails sent. The figure is a plain count of emails sent in that range.
In the Smartlead.ai help:
Total emails sent in the range. Raw event count.
Analytics overview, read 2026-11-12.If you changed an email account's server sign-in details, check that Smartlead has the new ones.
In the Smartlead.ai help:
SMTP or IMAP credentials updated but not refreshed in Smartlead
Understanding Email Account Disconnection Reasons in Smartlead, read 2026-11-12.Check the time zone your account uses. The daily limit starts again at midnight, so a different time zone can move sending between days.
In the Smartlead.ai help:
The daily limit of your email account is set to reset to 0 at exactly 00:00.
My campaign is not sending emails or sending less volume, read 2026-11-12.
How would I know the day it starts?
- Feder reads your emails sent from Smartlead.ai each day and compares each day with your own history.
- It tells you when emails sent 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 Smartlead.ai, which feeds Reach. Feder only reads. It never changes anything in Smartlead.ai.
What else goes wrong with these numbers?
- Why did my Smartlead replies drop?Smartlead.ai
- Why doesn't my Smartlead reply count match the replies I see?Smartlead.ai
- 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 Smartlead.ai 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.