Package: postfix Version: 2.9.1-5 Setting the postfix/protocols question in preseed has no effect on the final postfix config after installation - it is ignored. The problem is that the postinst script checks to see if the "changed" flag is set on this question, and nothing is setting this flag.
For example, preseeding: postfix postfix/protocols select ipv4 results in a main.cf file with no inet_protocols parameter, which means the default - all - is used in postfix operation. Looking at the postinst script, I think the fix is pretty trivial - setting the changed flag for postfix/protocols in fset_all_changed(). I'm attaching a patch that should take care of this. For what it's worth, there's an open Ubuntu bug #583216 (<https://bugs.launchpad.net/bugs/583216>) regarding this issue. It looks like this issue has existed for quite a long time - I looked back on my systems and can see it at least as far back as 2.2.10.
postfix_protocols_preseed.patch
Description: Binary data
