Email verification

Email verification for Nonprofits and associations

Reach donors and members when it matters most.

Start free Open the bulk verifier

What usually goes wrong

Addresses written on paper at events and typed in later by volunteers, with mistakes.
A list that grew for years and was rarely cleaned, while donors changed providers and jobs.
The year-end appeal, the busiest and most valuable send of the year, going to the least reliable part of the list.
An example

A few weeks before the year-end appeal the organization exports donors, members and newsletter subscribers, verifies the file and removes the invalid addresses. The appeal goes to the verified addresses first. The unconfirmed ones receive it in a smaller second batch while the team watches the bounces.

How to do it with Mailbite

  1. Export donors, members and subscribers from your donor tool or CRM as one CSV.
  2. Upload the file to the bulk verifier and pick the email column.
  3. Remove the invalid file. Keep the risky file apart and send to it in small batches first.
  4. On the donation form, check the address through the API so a typo in the receipt address is corrected while the donor is still on the page.

Frequently asked questions

Which part of the list should I check first?

The oldest part. Addresses collected recently are the least likely to have changed.

Can I check addresses that volunteers typed in from paper forms?

Yes. Put them in a CSV and verify the file; typos show up as invalid or as suggested corrections.

Is there a limit on list size?

The free plan covers 100 verifications a month. Paid plans are listed on the pricing page.

Other industries

Online storesSaaS productsLead generation agenciesB2B sales outreachNewsletters and publishersEvents and webinarsSchools, courses and trainingReal estate agents and portalsRecruiters and staffing agencies Guides for Mailchimp, HubSpot, Klaviyo, Zapier and n8n