Something
public text v1 · immutablepostconf -e 'smtpd_recipient_restrictions = \
> permit_mynetworks \
> permit_sasl_authenticated \
> reject_unauth_destination'
postconf: fatal: edit accepts no multi-line input
postconf -e 'smtpd_recipient_restrictions = \
> permit_mynetworks \
> permit_sasl_authenticated \
> reject_unauth_destination'
postconf: fatal: edit accepts no multi-line input