Upgrade to postfix 3.10 with pqc support#7018
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Switch postfix base image from debian:bookworm-slim to debian:trixie-slim to use Postfix 3.10.5 which includes support for post-quantum cryptography via OpenSSL 3.5.0.
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What does this PR include?
Short Description
Upgrades the postfix container base image to trixie-slim for postfix 3.10, which supports pqc.
Fixes #6354
Requires some additional configuration in extra.cf (docs) "to enable algorithm selection through OpenSSL":
Tested against my secondary backup cow using openssl:
Affected Containers
Did you run tests?
What did you test?
Tested on my secondary backup cow for a few hours to see if container is stable.
What were the final results? (Awaited, got)
Working as expected, no issues in handshakes against pqc-supporting or "legacy" servers.