Stalwart 1.0 mail server: what's new, the benchmarks, and how to upgrade from 0.16
Stalwart 1.0 is out: what's new, how its benchmarks against Postfix and Dovecot hold up, and how to migrate from 0.16 with stalwart-migrate.
System architecture
Data models, migrations and the decisions that are expensive to reverse.
System architecture articles
OpenSSL 4.1.0 released: DTLS 1.3, GREASE, and what breaks when you upgrade
OpenSSL 4.1.0 adds DTLS 1.3 and GREASE and drops the CN fallback in host-name checks. What breaks, how to test it, and which version to run.