Why did my email open rate drop in Omnisend?
The Omnisend help pages give 3 common reasons. The first to rule out: Inbox providers can treat you as a new sender after a move to a new email platform, even on the same domain, so opens can dip for a while.
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 Omnisend help pages give, and how to check each one yourself.
What causes it?
Inbox providers can treat you as a new sender after a move to a new email platform, even on the same domain, so opens can dip for a while.
In the Omnisend help:
When you start sending from a new platform, they treat you as a new sender, even if your domain is the same.
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.A big change to your emails, such as a new layout or sender name, can change how inbox providers treat them.
In the Omnisend help:
Any significant change to your emails can affect how inbox providers evaluate them:
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.Mail without sender authentication is more likely to land in spam, where fewer people see and open it.
In the Omnisend help:
Without authentication, your emails are more likely to land in spam.
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.
How do I check it myself?
Look at bounce rates and spam complaints next to open rates for each send.
In the Omnisend help:
Monitor open rates, bounce rates, and spam complaints after each send.
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.Check that your sending domain has valid MX records.
In the Omnisend help:
Check that your sending domain has valid MX records before your first send.
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.Compare engagement over several sends rather than judging one campaign on its own.
In the Omnisend help:
Focus on engagement trends over time rather than individual campaign results.
Email Deliverability When Switching to a New ESP | Omnisend Help Center, read 2026-11-12.
How does Omnisend work with Feder?
- Connect Omnisend to Feder and it joins your Reach apps.
- When you connect Omnisend, Feder checks the connection straight away and shows Connected only when that check passes. If a reading cannot be taken later, Feder shows it as not read, never as zero.
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 whether you can trust the numbers in Omnisend, one of your Reach apps. Feder only reads. It never changes anything in Omnisend.
What else goes wrong with these numbers?
- Why are my Omnisend campaigns reaching fewer people?Omnisend
- Why does my Omnisend click rate differ between reports?Omnisend
- 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 Omnisend 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.