Guides
Deliverability guides and product notes — no filler.
Bulk email verification: clean a list before you send
Bulk email verification cleans a list in one batch: upload a CSV, get a status, reason, and confidence score per address, then keep, drop, or review.
Email verification for ecommerce that protects revenue
Why online stores need email verification: catch typos at checkout, bulk-clean your customer list, and keep receipts and campaigns landing.
CAN-SPAM compliance, from honest headers to honored opt-outs
How CAN-SPAM compliance works for US commercial email: honest headers, a physical address, and honoring opt-outs within 10 business days.
CASL compliance: Canada's consent-first email law
How CASL compliance works: express vs implied consent, sender identification, unsubscribe rules, and how Canada's law differs from CAN-SPAM.
Email marketing laws by country, compared
How the major email marketing regimes compare: CAN-SPAM, CASL, GDPR/PECR and Australia's Spam Act, plus the habits that satisfy them all.
GDPR email marketing: consent, lawful basis, and subscriber rights
How GDPR and ePrivacy/PECR govern email marketing: the lawful basis a send needs, valid consent, the soft opt-in, and subscriber rights.
The best Bouncer alternatives in 2026, compared
Bouncer is a strong EU verifier — here's when an alternative fits, and the best options compared on price, depth, and catch-all honesty.
Verify emails from Typeform without a plugin
Verify emails from Typeform two ways: a real-time webhook per submission or a bulk CSV export, with serverless code and verdict handling.
How to verify emails from Google Forms
Verify emails from Google Forms two ways — a real-time Apps Script trigger or a bulk CSV export. No plugin needed; act on every verdict.
How to verify emails in WordPress forms
Verify emails in WordPress forms (Contact Form 7, WPForms, Gravity Forms) in real time via an API hook, or bulk-check exported entries by CSV.
How to verify emails with Zapier
Verify emails with Zapier using Webhooks by Zapier: POST each new signup to the Qualisend API, then branch on the status with a Filter or Paths.
Verify emails from Webflow forms before they bounce
Two ways to verify emails from Webflow form submissions: a real-time webhook that calls a verification API, or a bulk CSV export, with code.