Long-form resources
guides
Authority-level guides on email verification, deliverability, GDPR compliance, and cold outreach — structured, actionable, and regularly updated.
Email Verification: The Complete Guide
Everything you need to know about checking email addresses before you send — syntax checks, DNS lookups, SMTP handshakes, and risk scoring explained.
Read guide →Email Deliverability Guide
SPF, DKIM, DMARC, sender reputation, and inbox placement — a complete reference for SaaS teams who need reliable email delivery.
Read guide →GDPR for Email Marketing
Consent, data minimisation, DPAs, and the right to erasure. A practical compliance guide for EU and UK marketers in 2025.
Read guide →Cold Email Deliverability Guide
Domain warmup, sending infrastructure, personalisation at scale, and how to stay out of spam when running cold outreach campaigns.
Read guide →Clean your email list before your next campaign.
Remove invalid emails, catch-alls, and spam traps in minutes. Free to try — no account required.