Email Deliverability Intelligence for Small Senders
C6/10March 24, 2026
WhatA service that analyzes your outbound emails before sending and tells you exactly what will trigger spam filters across Gmail, Outlook, Yahoo, and others — with specific fix suggestions.
SignalMultiple commenters raised concerns that HTML-heavy emails get filtered to spam, and even experienced developers are unsure what actually triggers spam classification versus what's myth — there's genuine confusion about whether plain text is safer than HTML.
Why NowGoogle and Yahoo rolled out strict new sender authentication requirements in 2024, and spam filtering has become increasingly aggressive, making deliverability harder for legitimate small senders.
MarketSMBs and developers sending transactional/marketing email (~10M+ businesses); incumbents like Mail-Tester are basic one-shot tools, no one owns continuous pre-send deliverability analysis; adjacent to $4B email marketing market.
MoatProprietary deliverability data from analyzing millions of email renders across clients — the more emails tested, the more accurate the spam prediction model becomes.
Show HN: Email.md – Markdown to responsive, email-safe HTMLView discussion ↗ · Article ↗ · 324 pts · March 24, 2026
More ideas from March 24, 2026
Apple-Native IT Management Platform for SMBsP6/10A third-party IT admin platform purpose-built to fill the gaps Apple Business will inevitably leave, offering deeper MDM, onboarding automation, and cross-platform bridging for Mac-first companies.
One-Click Employee Onboarding for Mac-First TeamsC6/10An automated onboarding orchestrator that provisions a new employee across Apple Business, Google Workspace, Slack, GitHub, and dozens of other SaaS tools in a single workflow — purpose-built for Mac-centric companies.
Migration Tool From Google Workspace to Apple BusinessC5/10A turnkey migration service and software that moves an entire company's email, calendar, contacts, files, and permissions from Google Workspace or Microsoft 365 to Apple Business with zero downtime.
Apple Business Localization Layer for Non-US MarketsC5/10A compliance and feature-bridging platform that extends Apple Business capabilities to international companies, handling region-specific email hosting, data residency, and regulatory requirements Apple doesn't yet support.
Real-Time Supply Chain Attack Detection for Package RegistriesP7/10A monitoring service that continuously analyzes new package releases on PyPI, npm, and other registries for malicious payloads, alerting maintainers and users within minutes of a compromise.
Hermetic Dependency Sandboxing for AI Dev EnvironmentsP7/10A sandboxed runtime layer that intercepts and isolates all dependency installs and executions in AI coding tools (Cursor, Copilot, Windsurf) so compromised packages cannot access the host system.