- Senders send messages stamped with Bitcoin ecash to Nostr relays. The Nostr relays collect the Bitcoin ecash, then deliver messages to receivers.



Posteo is described as 'Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used' and is a popular webmail provider in the office & productivity category. There are more than 50 alternatives to Posteo, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Android Tablet apps. The best Posteo alternative is Proton Mail, which is both free and Open Source. Other great sites and apps similar to Posteo are Gmail, Tuta Mail, Disroot and mailbox.



Mailcheap is an API-first email hosting service with a user-friendly interface. We provide personalized email for all your domains & users with unmatched features and performance at affordable prices.




Professional anonymity provider for secure anonymous email. Anonymous Domain and Hosting Offshore, Anonymous Surfing, SSL, Time Delayed, Bulk Email and many more functions.
MrMail offers flexible Zimbra Hosting packages suitable for everyone, from single home user to a large company (SME) at superb prices and the best support in the industry.
Servermx is a reliable and secure email hosting for companies, organizations, and individuals featuring WebMail, POP3, IMAP4 and SMTP. All plans provide Calendars and Tasks via CalDAV and CardDAV support.

The world's first email hosting that makes communication inside your team easier with fewer meetings. Host your professional email on a secure, privacy-guaranteed, and ad-free email hosting service built-in with features like email marketing services can do.




NorthMail – Simple, Secure Email Access
NorthMail provides fast, secure, and reliable email access exclusively for NorthMail users. Designed for simplicity and privacy, our app lets you effortlessly manage your emails, calendar, and contacts directly from your iPhone.
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Bluewin is an e-mail service and news portal of Swisscom, the largest Swiss Internet provider and telecommunications company.


Opensource email which cares about your privacy. Developed and hosted in France.
0xchat is a secure chat app built on the Nostr protocol. It prioritizes security, featuring private key login, encrypted private chats and contacts, encrypted group chats.



