postmarkapp.com

Postmark: Fast, Reliable Email Delivery Service | SMTP | API

Overview

• Status: alive
• First seen: 2026-09-22
• Last crawled: 2026-09-22
• Security grade: D (65/100)
• TLS certificate expires: 2026-11-21
• Inbound links seen: 3

Security & email signals

• ✓ HTTPS
• ✓ HSTS
• ✗ Content-Security-Policy
• ✓ X-Content-Type-Options
• ✗ X-Frame-Options
• ✗ Referrer-Policy
• ✗ Permissions-Policy
• ✓ SPF record
• ✓ DMARC record
• ✗ DKIM record
• ✓ Cookies set securely
• ✓ Has real content (not an empty shell)
• ✓ Valid TLS certificate

Detected technology

Infrastructure: Cloudflare

Analytics & marketing: Google Tag Manager

This profile is generated automatically from passive, publicly observable data. Think something here is wrong or want this profile removed? See /bot.