Mailcheck

Mailcheck is an email verification tool that removes fake addresses, bots and inactive contacts from mailing lists. The team says it began by checking addresses by hand using social networks, and later automated the work. An API lets other software validate addresses as they are entered.

What Mailcheck offers

• Bulk list validation — checks uploaded lists; the vendor claims a million addresses in about 15 minutes.
• Real-time API — verifies addresses at the point of sign-up.
• Phone validation — checks phone numbers alongside emails.
• Social network checks — uses social profiles to confirm an address is real.
• Catch-all detection — flags domains that accept all mail.
• Duplicate handling — avoids paying twice for repeated entries.

Who it works with

Marketers who send cold or bulk email and want fewer bounces, plus online shop owners using the API.

Key facts

• Tiers: Pro, Agency, Enterprise and a custom option
• Guarantee: a 40-day money-back promise, as stated
• Experience: about three years of social-network validation, per the site