Brand Indicators for Message Identification (BIMI) is an email specification that displays authenticated organizational logos directly beside inbound messages in supported mail clients (Gmail, Apple Mail, Yahoo, Fastmail). Requiring strict DMARC enforcement and a cryptographicall…
DomainKeys Identified Mail (DKIM) provides end-to-end cryptographic integrity and domain attribution for email transmissions. Standardized under RFC 6376 and extended by RFC 8463, DKIM attaches a digital signature to the message header that receiving MTAs verify against a public …
Sender Policy Framework (SPF), standardized under RFC 7208, provides the foundation of email authentication by allowing domain owners to declare which IP addresses are authorized to send mail using their identity in the SMTP envelope (MAIL FROM). This guide covers SPF record synt…
Domain-based Message Authentication, Reporting, and Conformance (DMARC) is the policy and reporting architecture that bridges SPF and DKIM with domain alignment checks. DMARC empowers domain owners to instruct mailbox providers (such as Google, Microsoft, and Yahoo) on how to han…
← Back to Complete Engineering Directory Deliverability Engine • Link & HTML Security Free Outbound Email HTML & Tracking Link Sanitizer: Scan Hops, Pixels & Deliverability Traps By Fred Dawson • 100% Free Client-Side Security Tool • Instant Analysis Paste your campaign HTML and get a deliverability-safe version back. This sanitizer flags hidden 1×1 tracking […]
← Back to Complete Engineering Directory RFC 8058 • Google & Yahoo 2026 Mandate Free RFC 8058 One-Click List-Unsubscribe Header Generator & Bulk Sender Grader By Fred Dawson • Updated for 2026 Google & Yahoo Bulk Sender Enforcement • 5 Min Tool Generate the two headers Gmail and Yahoo require for bulk senders: List-Unsubscribe (https […]
Design production-ready, mobile-responsive HTML email templates in seconds using AutoSMTP AI. Create table-based layouts compatible with Gmail, Apple Mail, and Outlook with real-time visual preview and instant HTML export.
Model sales compensation and commission structures: base salary, On-Target Earnings (OTE), quota attainment tiers, and performance accelerators.
Plan how many sending mailboxes and secondary domains you need for target outbound volume, meeting goals, ESP mix, and safe daily send caps.
Paste raw email headers to trace MTA transit hops, transmission delays, SPF/DKIM/DMARC verdicts, sender IPs, and spam score heuristics.