Frequently Asked Questions

The most common email verification questions that we get asked

Email Verifier Questions

Because it helps with email deliverability, protects your domain reputation, helps your emails get into the inbox, and with mailfloss, also fixes typos that would have otherwise been lost.

Have you ever done email verification before? It sucks. mailfloss takes the suck out of it by completely automating the process. It's set and forget.

We are really accurate thanks to our deep clean engine. We don't post accuracy percentages because we don't believe accuracy percentages are...well accurate. They are a marketing ploy that our competitors use without the data to back it up. We put our money where our mouths are. If you aren't satisfied with our results simply ask for your money back within 30 days and we'll oblige.

We have in-app tooltips that guide you as well as help documentation and videos. Look for labels in the app that say "recommended". And if that isn't enough you can simply contact us and we'd be happy to offer suggestions.

Absolutely not. That would be very bad, break some laws, and annoy your subscribers. We use a number of other methods to determine if an email is valid.

Yes we can. Many email verifiers simply mark Yahoo and AOL addresses as accept-all because they are hard to verify, but mailfloss goes the extra mile with our deep clean engine and can verify these addresses with laser sharp accuracy.

Yes. You simply turn on Manual Mode and the results will display in the app for you to review. From there you can decide what to do with them such as tag, delete, unsubscribe, fix them, and more.

Yes, we remove duplicates before we initiate flossing. Your results report that gets returned to you will also have the duplicates removed.

We keep your data for 30 days so you can export your results. When we import results from your ESP we only take the email address and discard all other data. The same goes for any files uploaded to us - only the email address column data is kept and the rest is discarded.

Our specialty is definitely our deep email service provider integrations, which do all of the hard work for you. Otherwise, you can copy & paste or upload a csv file to us.

You can visit our knowledge base or tweet us over on Twitter @mailfloss.

Pricing Questions

Yes, we are happy to offer a money-back guarantee if you aren't satisfied with your results. We call it the love us satisfaction guarantee. If in 30 days you are not satisfied with the results simply let us know and we'll refund your money.

Yes, for our subscription plans we offer a 7-day unrestricted free trial.

Yes you can. Simply click the cancel link in the dashboard beside the plan name under the plans section.

Yes we do. This is to ensure your lists stay clean without disruption and because we get a lot of fraud. We also invest a lot of resources into our trial users and want to make sure they have the best experience possible.

A credit is used every time we successfully scan, floss, and categorize an email address.

Prepaid credits do not expire. Subscription credits renew at the beginning of each billing period and any unused subscription credits do not get rolled over to the next billing period.

We accept credit cards from Visa, Mastercard, and American Express. Please contact us if you must pay by prepaid or debit cards for alternative arrangements.

Yes, but not through the app. If you need to use these cards please contact us and we will send you an invoice.

Yes. You can change your plan inside of the app with one click under the plans section.

Add-ons allow you to upgrade your subscriptions with additional features such as:

  • add more subscription credits to your subscription
  • add additional ESP integration connections
  • add the category exclusions for auto-actions feature
  • add the typo fixer feature
  • add the ability to auto-update custom fields and tags

If you are subscribed to a subscription plan, you will see an add-ons tab under "Payments & Plans" where you can manage your add-ons.