Mail Servers

• Introduction and a Warning
• Virtual Domains and Mailboxes
• Razor
• Pyzor
• Distributed Checksum Clearinghouse (DCC)
• Rspamd Spam Filter
• MAS - Mail Access Server
• Mail Filters
• MTA - Mail Transfer Server
• MX - Mail Exchange Servers
• Encrypted Mail Transport
• MTA-STS
• Administration Web Interface
• WebMail
• Mail Client Auto-Configuration
• DNS for Mail Services
• Mail Server Backup
• Monitoring Mail Services
• Mail Services Testing

Prerequisites

• Certificates and Keys

• Domain Name Server

• Database Server

References

Other guides:

• ISPmail tutorial

• DigitalOcean How-To: Postfix, Dovecot, MySQL, and SpamAssasin