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~-[[DebianWiki/EditorGuide#translation|Translation(s)]]: [[pt_BR/HowtoSendWithEximThroughSSH|Português Brasileiro]] - English-~ |
Translation(s): Português Brasileiro - English
How to send mail with Exim through an SSH tunnel
A. Start the ssh tunnel
ssh $HOST -L 2525:$MSERVER:25
(where $HOST is the host you're tunneling through and $MSERVER is the outbound SMTP server you want to use)
B. Configure exim
1. Add a new transport file /etc/exim4/conf.d/transport/40_tunneled_smtp :
################################# # This transport is used for delivering messages over SSH-tunneled SMTP # connections to port 2525 on localhost
ssh_tunneled_smtp: debug_print = "T: tunneled remote_smtp for $local_part@$domain" driver = smtp allow_localhost = true port = 2525 hosts = 127.0.0.1 hosts_override = true
2. Edit /etc/exim4/conf.d/router/200_exim4-config_primary. In the 'smarthost:' section, change
transport = remote_smtp_smarthost
to
transport = ssh_tunneled_smtp
3. /etc/init.d/exim4 reload
Some variations
- Pick up the transport to use from a file:
transport = ${lookup{transport}lsearch{/etc/roaming/exim_options}{$value}{remote_smtp_smarthost}}
then, /etc/roaming/exim_options could contain:
transport: ssh_tunneled_smtp
or nothing at all to use the default
- Attempt deliveries only on some networks:
1. Add a new file /etc/exim4/conf.d/main/04_roaming :
# If the file /etc/roaming/not_online exists, don't send the messages but # enqueue them only queue_only_file = /etc/roaming/not_online
2. Add ifupdown hooks to create and remove the file:
iface home inet static [...] up echo '' > /etc/roaming/exim_options up rm -f /etc/roaming/not_online
iface work inet static [...] up echo 'transport: ssh_tunneled_smtp' > /etc/roaming/exim_options up touch /etc/roaming/not_online
Enrico Zini