Fairer trial than Zero Bounce
I really like Mailbox Validator. We are a systems builder company and are helping our clients to upload their ERP contacts to an ERP system database. Our needs are typically one-off so the credit system of Mailbox Validator would make our job a lot easier. We are currently suggesting to our clients to utilize either ZeroBounce or MailboxValidator to check their addresses against spell checks and bounces. Mailbox Validator is better than Zero Bounce because it offers a really fair trial (100 addresses).