Allegrow

Founded 2018

Verify B2B email addresses and navigate catch-all servers to prevent bounces

Pricing model

Free Trial

You can use Allegrow to verify corporate and catch-all email addresses to protect your domain reputation. The system checks email accounts behind secure gateways like Proofpoint and Mimecast without returning unknown results. You can identify primary mailboxes for decision-makers, filter out spam traps and disposable accounts, and run SMTP checks using managed quality IPs. Additionally, it lets you monitor inbox placement rates, run authentication tests, and simulate positive inbox engagement so cold outreach messages consistently land in recipient primary inboxes instead of spam folders.

What Allegrow does

Verify catch-all B2B email addressesFilter out spam traps and disposable addressesTrack email deliverability and sender scoreIdentify primary mailboxes for prospectsCheck domain authentication recordsClean bulk contact lists via APIBypass secure email gateway false flagsDefinitive catch-all domain email validationAutomated greylisting resolution for Proofpoint and Mimecast gatewaysPrimary mailbox detection for executives with multiple aliasesDynamic proxy management with verified high-reputation IPsDetection of spam traps, disposable emails, and inactive mailboxesInbox placement tracking and domain reputation monitoringAutomated positive email peer-to-peer interactionsCustomizable verification API with granular logic controls