Deliverability insights, straight from the team.
Practical guides on email verification, sender reputation, list hygiene, and authentication — everything we learn building the most affordable verification platform on the market.
7 ZeroBounce Alternatives Worth Testing in 2026
Comparing the best ZeroBounce alternatives for 2026 (Bouncer, NeverBounce, Kickbox, MillionVerifier and more), ranked by billing model, accuracy claims and real cost.
SPF, DKIM, and DMARC Explained (Without the Jargon)
SPF, DKIM, and DMARC explained the way practitioners use them: what each protocol does, how alignment binds them, and why Gmail and Yahoo require all three.
Catch-All Email Verification: Why 'Valid' Sometimes Lies
Catch-all domains accept mail for every address, so basic SMTP checks call dead mailboxes 'valid.' The mechanic behind it, and how to segment without losing leads.
What's an Acceptable Email Bounce Rate? The 0.3% Myth
An acceptable email bounce rate sits under 2%, under 1% on a well-kept list. The healthy bands, why 0.3% is really Gmail's spam rate, and how to stay low.