I do not usually announce FreeBSD port version bumps here, but in this case, I felt it appropriate. Sorry to those for whom this is not relevant.
I have updated the development port to Postfix 2.9 Snapshot 20120102 and removed the erroneous conf/post-install patch that was discussed earlier in the thread, thus preserving Wietse's safety net for incompatible changes in IPv6 defaults. PS: if anyone on this list is a FreeBSD user with interest in the maintenance of the Postfix ports, please get in touch off-list. -- Sahil Tandon