Blog
Email verification in practice
Deliverability, clean lists, and API patterns — short reads for marketing, growth, and product teams.
Featured bounce-rate
· 1 min read
How to lower email bounce rate before a campaign
Hard bounces hurt domain reputation and ESP metrics. A practical checklist: list verification, risky segmentation, and send timing.
bounce-ratedeliverabilitylist-hygiene
disposable
· 1 min read
What are disposable emails and how to block them
Temp mail at signup, freemium fraud, and how verification API protects your product from throwaway accounts.
disposablesignupfraud
catch-all
· 1 min read
What is a catch-all email address?
Catch-all domains accept any mailbox name. Learn why we classify them as risky and how to handle them in B2B campaigns.
catch-allriskydeliverability
list
· 1 min read
How to clean an email list before a campaign
A practical workflow: export from your ESP, verify CSV, filter invalid addresses, and re-import a clean list.
listcsvbounce-rate
verification
· 1 min read
How email verification works
Syntax, DNS, MX, and SMTP — what a verifier checks and what it does not do (no message delivered to the inbox).
verificationdeliverabilitybasics