It does not complicate the code. I am more concerned about
discoverability (how would a user even find out that the behavior
has become configurable).
The best we can do is cross-reference the new parameter under
smtp_bind_address (and IPv6 equivalent), and then sufficiently
motivated
users can find out how to make the setting a mandate rather than a
suggestion.
To me this looks like a reasonable feature request, despite the fact
that nobody else had asked for it in the first 24 years of Postfix.
So by no means urgent, but sensible.
Just to confirm I'm following along correctly. The current postfix
behavior is to try to bind to smtp_bind_address and smtp_bind_address6.
If it can't then postfix will attempt to bind to any address it can
before failing?
The feature request being discussed is making it so if postfix can't
bind to smtp_bind_address or smtp_bind_address6 it won't try finding
another address and defer instead while waiting for the bind addresses
to become available?
