Tutorials on email servers are sparse. Everyone wants to deploy a Vercel app, but nobody is standing up Postfix servers. Even more so for configuring multiple domains on a single VM.
We need four things:
- Outgoing SMTP Relay (AWS SES),
- Incoming SMTP Server (Postfix),
- IMAP Server (Dovecot),
- Authentication Provider / LDAP Server (OpenLDAP)
