About SuperMail

Professional email & outreach — get past the spam filter

Editor

J

Jonathan Sterling

Chief Deliverability Consultant & Postmaster Architect

Jonathan Sterling is an enterprise email deliverability consultant and ex-Postmaster Architect. He helps companies implement resilient SMTP relay architectures, DKIM rotation strategies, SPF/DMARC alignment, and warm up high-volume dedicated IPs safely.

Areas covered

  • Email deliverability
  • DMARC/SPF/DKIM
  • SMTP relays
  • IP Warmup
  • Postmaster Tools

Editorial policy

SuperMail publishes original guides written by an editor with direct experience in professional email & outreach. We do not accept guest posts, paid placements, or AI-generated filler. Every guide is reviewed against current public-source evidence before publication; pricing and platform data refresh at minimum quarterly.

Where this site links out to the parent product JobHunterBot, those links carry rel="sponsored noopener" and a UTM tag, per the anti-PBN link-hygiene policy defined in Epic 9 Story 9.14. Theme-adjacent satellites cross-link only when the linked material is directly relevant; non-adjacent satellites do not link.

Content sources & corrections

Sources are cited inline with the link text identifying the publishing organisation (e.g., "Harvard Business School", "Glassdoor Transparency Report", or the ATS vendor's own documentation). Outdated or incorrect facts get a correction edit and a `lastmod` front-matter bump so readers and crawlers see the update date on the page.

Spot an error? Open a thread on the relevant article — every post links to the latest from the SuperMail blog index.