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Posthouse — The Best Platform for Mail Clubs — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Email →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
2mailing.com ↗	68 match 1 shared topics	2Mailing: Best marketing email platform	en	email	robotsllmsaihumans	emailphone	none
ladybugmailclub.com ↗	67 match 1 shared topics	Ladybug Mail Club	en	email Shopify	robots llmsaihumans	emailphone	none
heycanarymail.com ↗	67 match 1 shared topics	Canary Mail - The Best Email App With AI & Calendar	en	email	robotsllmsaihumans	emailphone	none
ctrl-desk.com ↗	67 match 1 shared topics	Ctrl-Desk — The email client that knows your business.	en	email	robotsllmsaihumans	emailphone	none
connectivityapps.com ↗	67 match 1 shared topics	Connect for Hotmail – The best app to access your mail!	en	email WordPress	robotsllmsaihumans	emailphone	none
medul.la ↗	67 match 1 shared topics	Medul.la - Enterprise Email Marketing Platform	en	email	robotsllmsaihumans	emailphone	partial · 3
digisignatures.net ↗	67 match 1 shared topics	Email Signature Management & Tracking Platform \| DigiSignature	en	email	robotsllmsaihumans	emailphone	none
moondustmail.com ↗	67 match 1 shared topics	Moondust Mail — Private email, made for the quiet places.	en	email	robotsllmsaihumans	emailphone	partial · 8
heysendo.com ↗	66 match 1 shared topics	Sendo – Open source email platform	en	email	robotsllmsaihumans	emailphone	none
politepop.com ↗	66 match 1 shared topics	Polite Pop \| The polite email signup form	en	email	robotsllmsaihumans	emailphone	none
mtarget.co ↗	66 match 1 shared topics	Mailtarget - Email API & Email Marketing Platform	Colombia en	email	robotsllmsaihumans	emailphone	none
dexderity.ai ↗	66 match 1 shared topics	Hill — built for Up The Hill	en	email	robotsllmsaihumans	emailphone	none
padelrallyreport.com ↗	65 match 1 shared topics	Subscriber Newsroom - Newsletter Platform	en	email	robotsllmsaihumans	emailphone	none
directmail.digital ↗	65 match 1 shared topics	DirectMail.digital - Next-Gen Email Marketing Platform	en	email	robotsllmsaihumans	emailphone	none
acymailing.com ↗	65 match 1 shared topics	AcyMailing – Email marketing platform – Email marketing platform for WordPress and Joomla	en	email WordPress WooCommerce	robotsllmsaihumans	emailphone	none
1reach.net ↗	65 match 1 shared topics	1Reach - SMS, MMS & Email to SMS Platform	en	email	robotsllmsaihumans	emailphone	none
hidemailbox.com ↗	65 match 1 shared topics	HideMailbox — Temporary Email Service	en	email	robotsllmsaihumans	emailphone	none
digitalsprems.cfd ↗	65 match 1 shared topics	ImprovMX — Free email forwarding	en	email	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.