smtpd_tls_auth_only = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
+
+# Alex Dehnert, 2017-11-01
+# Based on https://serverfault.com/questions/663979/virtual-alias-domains-how-to-use-different-ip-addresses-when-forwarding-mail
+
+sender_dependent_default_transport_maps = hash:/etc/mail/sender-transport
# The relay_domains parameter restricts what destinations this system will
# relay mail to. See the smtpd_recipient_restrictions description in