Block a user
Outbound routing via MX DNS lookup
Authenticated submission listener
Write received messages to Maildir
Reject mail for unknown domains
Receive inbound mail for local domains
Basic SMTP listener using
emersion/go-smtp
Build script: watch mode for local dev
Search: client-side (pagefind or simple JSON index)
Template: Arcline design system header/footer/sidebar
Simple Go Markdown → HTML builder (goldmark)
Acceptable Use Policy summary
Arcline nameservers and DNS records