7 min read
Personalizing onboarding from the signup email domain
Branch onboarding on the signup email domain: team setup for company addresses, a solo flow for Gmail, an education plan for .edu. Code, UX copy and privacy rules.
Business email
Telling work addresses from personal ones: webmail, ISPs, role accounts, schools and governments.
- 4 min read
Is a Gmail address a business email?
No: @gmail.com is free personal webmail, even when a business uses it. Google Workspace on a custom domain is business. How to tell them apart in code.
- 7 min read
Email and domain intelligence glossary
Plain definitions of 40 email and domain intelligence terms, from catch-all and null MX to eTLD+1, RDAP, SPF and DMARC, with links to deeper guides.
- 6 min read
Detecting government email domains in every country
A country-by-country guide to government email domains: what .gov, gov.uk and gouv.fr rules catch, what they miss (gc.ca, bund.de, go.jp), with detection code.
- 6 min read
Verifying student and academic email addresses worldwide
How to check if an email belongs to a university or school: TLD rules that work, the countries they miss, a university domain list, and a verification flow.
- 6 min read
ISP email domains: why comcast.net is not a company
comcast.net, btinternet.com and orange.fr are consumer ISP mailboxes. Why they break lead enrichment and routing, which domains to list, and how to treat them.
- 6 min read
Role-based email addresses (info@, sales@): what to do with them
Role-based addresses like info@ and support@ are shared inboxes, not people. When to accept, flag or reject them, and how to detect them without false hits.
- 7 min read
How to find the company behind an email address
Turn an email address into a company name: normalize the domain, discard webmail and ISP domains, then resolve the rest from its website or an enrichment API.
- 6 min read
Should your B2B signup form require a work email?
When a work-email-only signup helps a B2B funnel, when it quietly costs you customers, and how to ask for a work email without rejecting anyone.
- 5 min read
Free email provider domains: the list that actually matters
The webmail domains worth listing, grouped by provider and region, why 30,000-domain lists answer a different question, and how to tune a list to your users.
- 6 min read
How to tell a business email from a personal one in code
Classify an email as business or personal: reduce to the registrable domain, check provider lists, then use MX records to catch personal custom domains.