Why is my MillionVerifier file stuck near the end with no results yet?
The MillionVerifier help pages give 4 common reasons. The first to rule out: Some addresses are grey-listed by their mail server and have to be checked again, which MillionVerifier does to give a more accurate result.
What causes it?
Some addresses are grey-listed by their mail server and have to be checked again, which MillionVerifier does to give a more accurate result.
In the MillionVerifier help:
Grey-listed emails need re-verification so we can provide you with more accurate and precise results.
File in Progress - MillionVerifier Help Pages, read 2026-11-12.The final re-check can take a while even when only a few addresses are left, so a file can sit near the end before it finishes.
In the MillionVerifier help:
This re-verification progress might take up to 45 minutes, even if only one email is left.
File Not Processing - Stopped at 98% - MillionVerifier Help Pages, read 2026-11-12.A list where most addresses share one or two domains can be checked much more slowly, so its results can arrive later than usual.
In the MillionVerifier help:
If your file contains email addresses mainly from 1-2 domains, your file may be slowed down by 90%.
Email Verification Speed - MillionVerifier Help Pages, read 2026-11-12.Addresses still being checked are not shown until the check ends, so the count of good addresses can look flat while a file is running.
In the MillionVerifier help:
Please be aware that there is no option to view emails that are currently in the verification process.
File in Progress - MillionVerifier Help Pages, read 2026-11-12.
How do I check it myself?
If you can wait, let the file finish; MillionVerifier says that leaves fewer addresses marked unknown.
In the MillionVerifier help:
If you wait until your file finishes, you reduce the number of unknown emails in your file.
File Not Processing - Stopped at 98% - MillionVerifier Help Pages, read 2026-11-12.If you stop a file early, check the results for the addresses already checked, which MillionVerifier makes available within seconds.
In the MillionVerifier help:
The results for already verified emails will be available in a few seconds.
File Not Processing - Stopped at 98% - MillionVerifier Help Pages, read 2026-11-12.
How does MillionVerifier work with Feder?
- Connect MillionVerifier to Feder and it joins your Interest apps.
- When you connect MillionVerifier, 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 MillionVerifier, one of your Interest apps. Feder only reads. It never changes anything in MillionVerifier.
What else goes wrong with these numbers?
- Why did my MillionVerifier API checks stop coming through?MillionVerifier
- Why did fewer emails come back as good in MillionVerifier?MillionVerifier
- 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 MillionVerifier 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.