Free email providers vs business domains in your B2B lists
Gmail, Outlook and Yahoo addresses carry no company signal, so B2B teams segment them. When free addresses are legitimate, how the free and role flags route them, and bulk detection.
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Deliverability, explained.
Guides and research on email verification, bounce rates, catch-all domains, disposable addresses, list hygiene and sender reputation. Written by the people who run the engine.
17 posts tagged list-hygiene
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@Role-based email addresses: should you email info@ and sales@?
Role accounts like info@ and sales@ belong to a function, not a person. Why ESPs distrust them, the consent problem, when B2B senders can still use them and how to detect them.
@GDPR and email verification: is verifying your list compliant?
Email verification is compatible with GDPR when done under a lawful basis with a processor agreement, minimal data and short retention. What to ask a vendor and what to record.
@How to reduce your email bounce rate (and why 2% is the line)
Keep hard bounces under 2% or mailbox providers start throttling you. Hard versus soft bounces, the main causes, a step by step cleanup plan and sunset policies.
@How to clean a Klaviyo list before your next flow
Clean a Klaviyo list the right way: export and verify, suppress undeliverable profiles, build a verified-deliverable segment, and keep sign-up forms clean with real-time checks.
@Disposable email addresses: what they are and why you should block them
Disposable inboxes from Mailinator, 10 Minute Mail and similar services die within hours. We cover what they cost you, how detection works and where to block them.
@How to clean a Mailchimp audience (without losing good contacts)
Two safe ways to clean a Mailchimp audience: export, verify and re-import with update existing contacts, or connect Verifyre to tag and unsubscribe undeliverable addresses.
@How to clean an ActiveCampaign list with tags and automations
How to clean an ActiveCampaign list: verify contacts, tag them by verdict, and let automations unsubscribe dead contacts and re-confirm risky ones. Steps, a CSV alternative and a verdict table.
@The email list hygiene checklist for 2026
A ten-step email list hygiene checklist: verify at capture, clean before big sends, drop role and disposable addresses, sunset the unengaged and keep your bounce rate under 2%.
@How to clean a Brevo contact list before your next campaign
How to clean a Brevo contact list: connect with an API key, verify the list, write results to an attribute, move dead contacts to a suppression list or blocklist, and know when to re-run it.
@Double opt-in vs single opt-in with real-time verification
Double opt-in gives you proof of consent but loses 20% to 40% of signups; single opt-in grows faster but lets bad addresses in. How real-time verification changes the trade-off.
@Email list decay: how fast do email lists go bad and what to do
Email lists typically lose 22% to 30% of their valid addresses every year. What drives decay, what it does to a 10,000-contact list, how to measure your own rate and how often to re-verify.
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