Email deliverability glossary: 40 terms every sender should know
Forty email deliverability terms defined in one or two sentences each: bounces, SPF, DKIM, DMARC, spam traps, greylisting, sender reputation, inbox placement and verification.
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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.
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@Real-time email validation on sign-up forms: how it works and what it catches
Real-time email validation checks an address as it is typed: syntax, typos, disposable domains, role accounts, MX and an optional mailbox check. Here is how it works.
@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.
@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.
@Sender reputation in 2026: what the Gmail and Yahoo bulk sender rules mean for you
Sender reputation explained: what Gmail and Yahoo measure, the February 2024 bulk sender rules one by one, how bounces and complaints feed it, and a 30-day recovery plan.
@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.
@Verify emails with Zapier or Make: step-by-step setup for both
Verify every lead with one HTTP step: Webhooks by Zapier GET plus a Filter, or Make's HTTP module plus a Router. Exact settings, typo fixing, error handling, costs and a Zapier vs Make comparison.
@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.
@How to verify emails in Google Sheets: three methods compared
Three ways to verify emails in Google Sheets compared, then a full Apps Script custom function with caching, the formulas to use it, formatting tips and when to switch to a bulk job.
@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.
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