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[master] / test / t-02-exim / config / exim4.in 

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CONFDIR = ${EXIMDIR}

spool_directory = CONFDIR/spool
exim_path = CONFDIR/exim4

# No need to keep anything on the environment.
# This is the default, but exim emits a warning if it's not set
# (https://www.exim.org/static/doc/CVE-2016-1531.txt).
keep_environment = 

# Disable TLS for now.
tls_advertise_hosts =

# Run as the current user.
exim_group = ${USER}
exim_user = ${USER}

# Listen on a non-privileged port.
daemon_smtp_port = 2025

# ACLs to let anyone send mail (for testing, obviously).
acl_smtp_rcpt = acl_check_rcpt
acl_smtp_data = acl_check_data

begin acl
acl_check_rcpt:
  accept

acl_check_data:
  accept


# Rewrite envelope-from to server@srv-exim.
# This is so when we redirect, we don't use user@srv-chasquid in the
# envelope-from (we're not authorized to send mail on behalf of
# @srv-chasquid).
begin rewrite
user@srv-chasquid  server@srv-exim F

# Forward all incoming email to chasquid (running on :1025 in this test).
begin routers

rewritedst:
  driver = redirect
  data = someone@srv-chasquid

forwardall:
  driver = accept
  transport = tochasquid

begin transports

tochasquid:
  driver = smtp

  # exim4 will by default detect and special-case deliveries to localhost;
  # this avoids that behaviour and tells it to go ahead anyway.
  allow_localhost
  hosts_override

  # chasquid will be listening on localhost:1025
  hosts = localhost
  port = 1025

  # Add headers to help debug failures.
  delivery_date_add
  envelope_to_add
  return_path_add