Self-hosting email the hard way from your own routable IPv4 block up
Summary
Anil Madhavapeddy describes rebuilding a self-hosted email stack using a RIPE /24 IPv4 block with Postfix, rspamd, Dovecot, and webmail to achieve SPF/DKIM/DMARC deliverability. The article covers receiving, sending, and access, plus SRS for forwarding, greylisting, and DMARC reporting, along with DNS records and transport security considerations. The post emphasizes the operational complexity and learning value for SMB IT seeking decentralized email control.