puppet: Permit outgoing mail from postfix.
puppet: Permit outgoing mail from postfix.

The configuration change made in 1c17583ad5b2 only allowed delivery to
those specific Zulip addresses.  However, they also prevent the
mailserver from being used as an outgoing email relay from Zulip,
since all mail that passed through the mailserver (from any
originator) was required to have a `RCPT TO` that matched those
regexes.

Allow mail originating from `mynetworks` to have an arbitrary
addresses in `RCPT TO`.

hackerkid/zulip,andersk/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,zulip/zulip,kou/zulip,showell/zulip,hackerkid/zulip,showell/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,rht/zulip,andersk/zulip,showell/zulip,kou/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,showell/zulip,showell/zulip,rht/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,hackerkid/zulip,punchagan/zulip,eeshangarg/zulip,punchagan/zulip,punchagan/zulip,kou/zulip,andersk/zulip,showell/zulip,eeshangarg/zulip,eeshangarg/zulip,eeshangarg/zulip,rht/zulip,kou/zulip,showell/zulip,zulip/zulip,rht/zulip,zulip/zulip,andersk/zulip,kou/zulip,zulip/zulip,rht/zulip,andersk/zulip,zulip/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,hackerkid/zulip