Sending emails: Postfix using Fastmail (Rev: 05/31)
Postfix is a free, open-source mail transfer agent (MTA) used to route and deliver email over the Internet. FastMail is a paid service that provides a secure, privacy-focused email provider supporting custom domains. This post details the setup instructions for using Postfix as a Send-Only SMTP server, using Fastmail, on a Ubuntu Linux 22.04 server.