#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2017-12-20 18:40:20 +0000 (Wed, 20 Dec 2017)
#
#  https://github.com/HariSekhon/HAProxy-configs
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

# ============================================================================ #
#                           H A P r o x y  -  S M T P
# ============================================================================ #

# run as root to bind to port 25

frontend smtp
    description "SMTP"
    bind *:25
    mode tcp
    option tcplog
    default_backend smtp

backend smtp
    description "SMTP"
    balance leastconn
    mode tcp
    acl internal_networks src 192.168.0.0/16 172.16.0.0/12 10.0.0.0/8 127.0.0.1
    tcp-request content reject if ! internal_networks
    option smtpchk
    #server office365 smtp.office365.com:587 check
    server smtp smtp:25 check
    server mail mail:25 check
    server docker docker:25 check
    server 192.168.99.100 192.168.99.100:25 check