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Knowledge Base / Programs & Certification

How to verify your email list

By Eric J · Updated March 4th, 2026 · Programs & Certification

Email List Verification How-to Guide

Using an email list verification service is an important step for email marketers because it helps minimize the chances of getting marked as spam and helps to ensure that emails are reaching the right recipients. A list verification service is available within InboxAlly to help to identify and remove invalid, inactive, and duplicate email addresses, which can lead to improved deliverability and a higher open rate.

How do I upload my file?

Please make sure to upload your file in .CSV format.

How do I use the cleaned list?

We recommend that you mail to the Valid emails and this new list of only valid emails will be available for download after your uploaded file is processed.

How long does it take in order to verify a list?

Email list verification time depends on many factors but on average, a list of 100,000 email addresses should take less than 30 minutes to verify.

What are Verification Credits?

One credit allows for one verification request and credits are renewed monthly. The number of credits allocated is based on your InboxAlly plan. Unused credits are not carried forward.


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