######################################################################
#                      TRANSPORTS CONFIGURATION                      #
######################################################################
#                       ORDER DOES NOT MATTER                        #
#     Only one appropriate transport is called for each delivery.    #
######################################################################

# A transport is used only when referenced from a router that successfully
# handles an address.

begin transports


# This transport is used for delivering messages over SMTP connections.
# Refuse to send any message with over-long lines, which could have
# been received other than via SMTP. The use of message_size_limit to
# enforce this is a red herring.

remote_smtp:
  driver             = smtp
  message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}


signed_smtp:
  driver             = smtp
  message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
  dkim_domain        = ${if def:authenticated_id {$sender_address_domain}}
  dkim_selector      = $primary_hostname
  dkim_private_key   = DKIMDIR/$dkim_selector._domainkey.$dkim_domain.pem
  dkim_canon         = relaxed
  dkim_strict        = yes


# This transport is used for local delivery to user mailboxes in traditional
# BSD mailbox format. By default it will be run under the uid and gid of the
# local user, and requires the sticky bit to be set on the /var/mail directory.
# Some systems use the alternative approach of running mail deliveries under a
# particular group instead of using the sticky bit. The commented options below
# show how this can be done.

#local_delivery:
# driver = appendfile
# file = /var/mail/$local_part
# delivery_date_add
# envelope_to_add
# return_path_add
# group = mail
# mode = 0660


remote_lmtp:
  driver             = smtp
  protocol           = lmtp
  port               = 24


# This transport is used for handling pipe deliveries generated by alias or
# .forward files. If the pipe generates any standard output, it is returned
# to the sender of the message as a delivery error. Set return_fail_output
# instead of return_output if you want this to happen only when the pipe fails
# to complete normally. You can set different transports for aliases and
# forwards if you want to - see the references to address_pipe in the routers
# section above.

address_pipe:
  driver              = pipe
  return_output


# This transport is used for handling deliveries directly to files that are
# generated by aliasing or forwarding.

address_file:
  driver               = appendfile
  delivery_date_add
  envelope_to_add
  return_path_add


# This transport is used for handling autoreplies generated by the filtering
# option of the userforward router.

#address_reply:
# driver = autoreply