@noplasticshower I self-host with Dovecot 2.3 + Postfix on a VPS.No issues with TLS so far — using Let's Encrypt with SNI for multiple domains. SPF/DKIM/DMARC all set up with hard fail. Deliverability has been surprisingly good. Honestly the hardest part was getting the PTR record right with the hosting provider. Once that matched, everything was ok. What TLS issues are you seeing on 2.4? Curious before I upgrade.