Mailbox Validator validates your email lists to check for invalid or undeliverable emails. You can either upload your email list and clean it in bulk using the CSV format, or integrate with MailboxValidator API.
They also have integrations for MailChimp, Zapier, AWeber, Mailgun, Campaign Monitor, SendGrid and SparkPost.
Free Trial/Demo – Available
Paid Version – their pricing plan starts at $19.95 for 1000 verifications.
