I decided to set up some of my mail servers to require certification authentication on the submission port (587). In my case, I want to forward mail from my server at home to my public servers out there on the Internet. I don’t want just anyone to be able to submit mail here, so the easiest way for me do to this was with certification.
Postoffice — Encrypted Mail Service
Send secure, encrypted messages as NFTs. Only the recipient can decrypt. Permanent, immutable, and truly private communication on the blockchain.
Requirements for HTTPS for Local Domains
When connecting to servers on their local network, users are surprised to encounter user interfaces that display errors, show insecure connections, and block some HTTP features when missing a secure context. However, obtaining PKIX certificates for those servers is difficult for a variety of reasons. This document explores requirements for authenticating local servers.
HTTPS for Local Networks · Issue #78 · w3c/tpac2024-breakouts
Session description It is not possible to get a publicly trusted CA to sign a certificate for a local domain (i.e. a non-publicly resolvable domain name such as router.local, printer.home, 192.168....
forwardemail/caldav-adapter
CalDAV server for Node.js and Koa. Modernized and maintained for @forwardemail
Install a root CA certificate in the trust store
Enterprise environments sometimes have a local Certificate Authority (CA) that issues certificates for use within the organization. For an Ubuntu server to be functional, and to trust the hosts in ...
Merkle Tree Certificates
This document describes Merkle Tree certificates, a new form of X.509 certificates which integrate public logging of the certificate, in the style of Certificate Transparency. The integrated design reduces logging overhead in the face of both shorter-lived certificates and large post-quantum signature algorithms, while still achieving comparable security properties to traditional X.509 and Certificate Transparency. Merkle Tree certificates additionally admit an optional signatureless optimization, which decreases the message size by avoiding signatures altogether, at the cost of only applying to up-to-date relying parties and older certificates.
Self-hosting email the hard way from your own routable IPv4 block up
How we refreshed self-hosted Recoil email with our own RIPE-allocated IPv4 block, and deployed Postfix/rspamd/Dovecot to get full SPF/DKIM/DMARC deliverability.
Free Email Forwarding for Custom Domains - #1 Open Source Email Service 2026
Get free email forwarding for custom domains. Send & receive as you@yourdomain.com with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.
Open Badges 3.0: Complete guide to digital credentials | POK
Discover what Open Badges 3.0 are, the global standard for verifiable digital credentials. Learn how they work and how POK uses them to certify skills and competencies.
Verified.Quest
Below you will find answers to the most common questions about this project, instructions for requesting verification, and details on how to see badges on the Officially Verified accounts in your feed.
These 20 Awesome API Clients Will Change How You Work with APIs
Postman has become a staple in API development, but it’s far from the only option. As the API...
