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BounceShield is our in-house email verification platform that checks whether email addresses are valid or invalid. Our algorithm uses 10+ checks to determine if an email address is valid or not, including the address format, DNS configuration, and SMTP checks.

With 99% accuracy, BounceShield significantly improves your email reputation.

The two ways to use BounceShield

There are two ways to use Mailmeteor BounceShield:

1. For all users, BounceShield is available as a bulk email verification solution. You import a list of contacts and BounceShield verifies them. You can then export the results to send emails via Mailmeteor or another email platform. Learn more.
2. For Pro and Business customers, BounceShield verifies all emails sent via the platform. When BounceShield detects an invalid email address, the email is not sent. This increases the deliverability of your emails without you even thinking about it. Learn more.

Trying out BounceShield for free

BounceShield is also available as a free tool, to verify one email address at a time. Give it a try now.

Behind the scenes

BounceShield uses 10+ signals to detect valid and invalid email addresses. Signals can be grouped into four categories:

• Format. Whether the email address has the correct format and is not gibberish.
• Professional. The domain name is not associated with temporary services.
• Domain status. The domain name is active and has valid MX records.
• SMTP server. The mail server is reachable and confirms that the email address exists.

Using these signals, our in-house algorithm provides a 99% accuracy on detecting email addresses.