Dan Mahoney:
> I've wondered this for a while, and have even suggested the day
> job implement this in our own software.
>
> This feels like a reasonable place to ask. Is there a way, given
> a new warning about compatibility_level (say you've been running
> with 3_5, and you're now running 3_6), to see what changes to your
> config are effectively made by enabling that level? (effectively,
> to show a defaults-diff, or any commands whose behavior may not
> have the same meaning under a previous version)?
Yes. The old and new defaults are available in postconf output.
Not pretty but it is there.
Wietse
$ postconf -d | grep compatibility_level
append_dot_mydomain = ${{$compatibility_level} <level {1} ? {yes} : {no}}
compatibility_level = 0
lmtp_tls_fingerprint_digest = ${{$compatibility_level} <level {3.6} ? {md5} :
{sha256}}
mynetworks_style = ${{$compatibility_level} <level {2} ? {subnet} : {host}}
relay_domains = ${{$compatibility_level} <level {2} ? {$mydestination} : {}}
respectful_logging = ${{$compatibility_level} <level {3.6} ? {no} : {yes}}
smtp_tls_fingerprint_digest = ${{$compatibility_level} <level {3.6} ? {md5} :
{sha256}}
smtpd_relay_before_recipient_restrictions = ${{$compatibility_level} <level
{3.6} ? {no} : {yes}}
smtpd_relay_restrictions = ${{$compatibility_level} <level {1} ? {} :
{permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination}}
smtpd_tls_fingerprint_digest = ${{$compatibility_level} <level {3.6} ? {md5} :
{sha256}}
smtputf8_enable = ${{$compatibility_level} <level {1} ? {no} : {yes}}
