master.cf

# Postfix master configuration file for the instance handling all outbound email.
localhost:10025      inet  n       -       y       -       -       smtpd
        -o inet_interfaces=loopback-only
{% for overlay in float_host_overlay_networks %}
{{ hostvars[inventory_hostname]['ip_' + overlay] }}:10025      inet  n       -       y       -       -       smtpd
        -o inet_interfaces={{ hostvars[inventory_hostname]['ip_' + overlay] }}
{% endfor %}

pickup    unix  n       -       y       60      1       pickup
cleanup   unix  n       -       y       -       0       cleanup
qmgr      unix  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       y       1000?   1       tlsmgr
rewrite   unix  -       -       y       -       -       trivial-rewrite
bounce    unix  -       -       y       -       0       bounce
defer     unix  -       -       y       -       0       bounce
trace     unix  -       -       y       -       0       bounce
verify    unix  -       -       y       -       1       verify
flush     unix  n       -       y       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       y       -       -       smtp
smtp-lowpri unix  -       -       y       -       -       smtp
relay     unix  -       -       y       -       -       smtp
        -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
        -o smtp_host_lookup=native
        -o ignore_mx_lookup_error=yes
showq     unix  n       -       y       -       -       showq
error     unix  -       -       y       -       -       error
retry     unix  -       -       y       -       -       error
discard   unix  -       -       y       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       y       -       -       lmtp
        -o lmtp_host_lookup=native
anvil     unix  -       -       y       -       1       anvil
scache    unix  -       -       y       -       1       scache