Database Cleanup -- Email Verification Vendors

Hi Everyone,

I am working on cleaning up our database, specifically around deliverability and validation. I would love to hear what other people have done, as well as any experiences you may have had (good or bad) with vendors. I would like to do a two part process consisting of:

1. Cleansing our current email database through some sort of validation/verification tool. Then be able to take any invalid emails and remove them from the system.

2. Implement a preventative/ continuous email cleansing system to check and verify new emails coming into the system.

Any suggestions around what you have done to clean up your system, as well as any specific vendor recommendations would be greatly appreciated.

Thank you!

Mary