I've updated the postfix ebuild to the newest available IPv6 and TLS patch versions. Merged and works fine here without any signs of a problem. Reproducible: Always Steps to Reproduce:
Created attachment 9461 [details, diff] patch for ebuild
Created attachment 9462 [details, diff] proposed patch
already in portage lostlogic added it 10 days ago
Yes, there is an 2.0.6 ebuild in portage using the old patch versions for 2.0.3 where at least the IPv6 patch had a serious bug. See http://www.ipnet6.org/postfix.html for details