postmasterplus.app

.app crawl

First seen 2026-04-26 · Last seen 2026-05-16 · ok HTTP/1.1 200 2445 ms crawled 2026-05-19

US · 108.156.22.16 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Postmaster+
Language: en

Technology

CDN: Amazon CloudFront

Analytics

Google Tag Manager

Third-party hosts loaded (5)

d2ld3ngaqb20gy.cloudfront.net×33
fonts.bunny.net×2
px.ads.linkedin.com×1
r.wdfl.co×1
www.googletagmanager.com×1

DNS records live

NS

ns-1462.awsdns-54.org
ns-148.awsdns-18.com
ns-1625.awsdns-11.co.uk
ns-570.awsdns-07.net

Verified for

Google

Email authentication no MX

SPF: not published
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

Amazon RSA 2048 M04

from 2025-11-21 to 2026-12-21

Expires in 214 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://postmasterplus.app/login

findings

missing HSTS
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Linked from (1)

emailresourc.es×2