Mailersend

Authelia is an open-source authentication and authorisation solution, fulfilling an identity and access management (IAM) role, providing multi-factor authentication (MFA) and single sign-on (SSO) for applications via a web portal.

Self-hosting multiple applications often means having to deal with disparate user accounts unless you can integrate them with a common third party. A tried and tested framework for this is the ubiquitous LDAP, or Lightweight Directory Access Protocol, server.