Safe, risky, invalid: email verification statuses explained

Every verified lead in LeadMarina carries an email status. Here's what the verifier actually does, what each label means, and how to act on it — useful whether you use our tool or verify lists yourself.

What SMTP verification checks

A verifier walks the same path a real email would: is the address syntactically valid, does the domain exist with mail servers (MX records), and does the server accept mail for this exact mailbox — all without sending anything. It also flags disposable addresses and catch-all domains along the way.

The statuses

• Safe — the mailbox exists and accepts mail. Send with confidence.
• Risky — usually a catch-all domain: the server accepts everything, so the specific mailbox can't be confirmed. Real mail often still lands; route these to a separate, warmed-up sequence.
• Invalid — the mailbox or domain doesn't exist. Never send; each invalid send damages your sender reputation.
• Unknown — the server wouldn't answer (timeouts, greylisting). Treat like risky: possible, unproven.

Why bounces cost more than the bad row

Mailbox providers track your bounce rate. Past a few percent, deliverability drops for your whole domain — including the emails to perfectly good addresses. That's the real cost of an unverified list: it spends your sender reputation, which takes weeks to rebuild.

How to use statuses in practice

• Cold outreach: 'safe' only. Volume you can trust beats volume you can't.
• 'Risky' / catch-all: smaller batches from a secondary domain, watch the bounce rate.
• 'Invalid': delete, or route the lead to phone/social outreach instead — the business is still real even when the email isn't.

In LeadMarina, every email on every lead ships with one of these statuses already attached (phones get line type + carrier the same way), so segmentation is a filter, not a project.