← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Configure OpenDKIM with Postfix for multi-domain sending: managing KeyTable, SigningTable, TrustedHosts, 2048-bit RSA keys, and DNS publication. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Key Length 2048-bit RSA Cryptographic standard Table Model Dynamic Lookup KeyTable […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Push Postfix beyond default limits: tuning qmgr, default_destination_concurrency_limit, master.cf process caps, and Linux kernel socket buffers. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Process Cap 500 Daemons Concurrent smtp client Destination Rate 20 Sockets Per-domain […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Step-by-step Postfix mail server build: configuring FCrDNS, strict TLS 1.3, OpenDKIM signing, transport maps, and anti-abuse ingress controls. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Authentication SPF + DKIM + DMARC Triple-gate alignment Encryption Mandatory […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Master MailWizz list architecture: global vs list-level suppression, automated bounce handling, spam-trap elimination, and engagement segmenting. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Hard Bounces Immediate Drop Zero-tolerance suppression Soft Threshold 3 Deferrals Automatic lifecycle […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Comprehensive MTA selection framework for 10M+ monthly email senders: comparing PowerMTA, KumoMTA, Postfix, and Haraka across throughput and reliability. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Throughput Scale 1M+ msgs/hr Cluster wire capacity Queue Topology […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Complete MailWizz optimization guide: configuring delivery servers, high-speed cron triggers, DKIM signing, bounce servers, and PowerMTA binding. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Cron Cadence Every 1 Min Parallel daemon dispatch Batch Size 2,500 […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Architectural comparison of KumoMTA, Postfix, and PowerMTA: wire throughput, Lua scriptability, queue latency, memory models, and enterprise cost. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Wire Output 250K/hr (Rust) KumoMTA peak rate Virtual MTAs Native […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Calibrate MTA connection limits, message-per-connection rates, and recipient concurrency for Gmail, Yahoo, Microsoft, and European mailbox providers. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Socket Burst 25 Conns Per-destination peak Wire Rate 100 msgs/conn Session […]
← MTA Administration Knowledge Base Production MTA Operations Executive Summary: Production MTA email queue management: reading health signals, clearing ISP jams, prioritizing transactional streams, and automated spool monitoring. Author: Fred Dawson (MTA Infrastructure Architect) Standard: AutoSMTP High-Volume SRE Category: MTA Administration Read Time: ~15 min Queue Latency < 30s Spool to socket time Throughput Floor […]