postfix:
# optional: Whether to put a postscreen on port 25
postscreen: True
+ # optional: Open another SMTP daemon on port 26 that only accepts mail from local hosts
+ # (and whitelisted client certs, if applicable). Useful when the source of the mail is in
+ # a network that blocks port 25 outgoing.
+ smtpd_26: True
# optional: Whether to accept emails for arbitrary destination on the submission port,
# authenticated by dovecot. Requires a dovecot: section (see below).
submission: True