Why doesn't my Icypeas email count match the list I sent?
The Icypeas help pages give 3 common reasons. The first to rule out: Results are read a page at a time, so a count taken from one page can be lower than the whole list.
What causes it?
Results are read a page at a time, so a count taken from one page can be lower than the whole list.
In the Icypeas help:
Up to 100 results per call.
Read search results | Icypeas API, read 2026-11-12.If two lists were started together, their rows can come back side by side, so one list's count can include rows from the other.
In the Icypeas help:
Rows of bulk searches started at the same time can be mixed: use their `file` field to group them.
Read search results | Icypeas API, read 2026-11-12.A large list is still working for a few minutes, so a count taken early can be short of the final number.
In the Icypeas help:
A bulk search of thousands of rows takes a few minutes.
Frequently asked questions | Icypeas API, read 2026-11-12.
How do I check it myself?
Give each row your own id, then match results back to your list by that id to see which rows are missing.
In the Icypeas help:
Ids come back in each result as `userData.externalId`.
Bulk search: find or verify up to 5,000 emails per call | Icypeas API, read 2026-11-12.Read results slowly or have them come to you as they finish, so a count is not cut short by reading too fast.
In the Icypeas help:
Wait at least 3 seconds between two reads, or better, use webhooks: they don't count against any limit.
Rate limits | Icypeas API, read 2026-11-12.
How does Icypeas work with Feder?
- Connect Icypeas to Feder and it joins your Interest apps.
- When you connect Icypeas, 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 Icypeas, one of your Interest apps. Feder only reads. It never changes anything in Icypeas.
What else goes wrong with these numbers?
- Why did Icypeas find fewer emails than usual?Icypeas
- Why did Icypeas stop returning any results?Icypeas
- 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 Icypeas 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.