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Say goodbye to bounces, with our BounceShield.

Mailmeteor BounceShield is an in-house email verification algorithm that detects invalid email addresses and prevents bounces before sending your emails.

5-stars Rated 4.9/5 out of 10,000+ reviews


Send emails. Not bounces.

Sending emails that bounce is ruining your email marketing and negatively affects your email reputation. You know it, but cleaning your contact list is costly and time-consuming.

Good news. With Mailmeteor BounceShield your email campaigns are automatically protected from bounces, at no extra cost. So you can be confident that your emails will reach your subscribers' inboxes.

Read more about how BounceShield works →
Gmail deliverability

Seamless integration

Our proprietary algorithm is natively integrated into Mailmeteor. It checks for typos, malformed email addresses, DNS records, SMTP configuration, and more factors to estimate how accurate the email address is and how likely it will bounce.

Bid farewell to the headache of bounces and shield your email reputation. With Mailmeteor BounceShield, you can ensure that your emails are reaching the inbox, every time.

Send a campaign right now →
How Mailmeteor protects your privacy

An emailing platform you can trust

Like every Mailmeteor product, Mailmeteor BounceShield has been designed with your privacy and security in mind.

The email addresses are securely verified, using one-way encryption. That's the kind of product we want to use ourselves.

Learn more about our approach to security →

Recommended by Google

Mailmeteor is recommended by Google as a market-leading application to help you get work done.

This recognition by Google itself marks years of effort to create a stunning application that natively integrates with Google Workspace products, such as Gmail and Google Sheets.


Recommended for Google Workspace

How much will you save?

Save money and time on email validation with Mailmeteor unlimited offers.
Some Examples
Emails per month Save up to
5,000 emails $25
10,000 emails $50
25,000 emails $125
50,000 emails $250

From small to very large senders, Mailmeteor BounceShield will save you a lot while maximizing your deliverability.

Join 5 million professionals

Companies & organizations from all over the world trust Mailmeteor. Read all reviews.

One of the best email marketing tool to send personalize emails to maximum number of contacts in a given time. I love that I can customize each email with specific details, and the real-time tracking and follow-up features have been incredibly useful.


Google Workspace Marketplace

This truly is an AWESOME product for anyone who lives in the Google Suite like I do. It really helps keep small prospecting or 1-off group emailing efforts super organized and efficient. Mailmeteor is the PERFECT additional tool in the toolbox to shoot out any short-term or batch type of email outreach.



Mailmeteor has quickly become an indispensable tool for our team. What sets it apart from other email platforms is its ability to create personalized mass emails that make our recipients feel truly special, rather than just another name on an email list.



A cut above the rest of the Gmail mail merge add-ons available. Super easy to use and a generous free plan. Plus, importantly, it doesn't request permission to read my emails.


Google Workspace Marketplace

Questions & answers

Find tutorials & help guides in our documentation.

Mailmeteor BounceShield is a fully automated service that verifies email addresses in your campaigns and detects potential bounces before sending any emails.

Mailmeteor BounceShield is included at no extra charge in our Pro and Business plans.

Mailmeteor BounceShield verifies 100% of your emails sent via Mailmeteor.

Mailmeteor BounceShield works in real-time, in the background, to verify 100% of your emails. There may be instances where you still receive a bounce, despite verifying the email address beforehand. This could be due to the email being deleted between the time it was verified and when it was actually sent. Also, in some cases, a bounce can only be detected by actually sending an email to the email address.

Bounces happen when you send emails to invalid email addresses. By verifying email addresses before sending emails, you reduce the likelihood of receiving bounced emails. Mailmeteor BounceShield verifies your emails before sending them, so you don’t have to.

Ready for take off?

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Free plan

Get up and running for free
  • Mail merge in Sheets
  • Personalized emails

Paid Plans

Unlock full sending capacity
  • Unlimited email verification
  • Open & click tracking
  • Follow up after minutes
  • Email sequences
  • Alias & attachments
  • Manage your team

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