howto/EMail.md
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@@ -19,3 +19,25 @@ This is controlled by the `ignore_target_hosts` variable in the configuration fi
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Don't forget to add your dn42 domains to the list of local domains, so that you accept incoming emails. On Debian, it is controlled by `dc_other_hostnames` in `update-exim4.conf.conf`. For instance:
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dc_other_hostnames='myself.org;myself.dn42;myserver.myself.dn42'
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+
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+
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+## Postfix
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+
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+### Sending Mails
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+If your machine sends/receives Mails in "clearnet" with specific bound IP's you need to create an additional transport in master.cf
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+
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+ out_dn42 unix - - n - - smtp
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+ -o smtp_bind_address=172.23.67.1
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+ -o smtp_bind_address6=fd70:96c9:ef25::1
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+ -o smtp_helo_name=ns1.mhm.dn42
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+ -o syslog_name=postfix-dn42
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+
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+and add this transport to /etc/postfix/transport for dn42 (and dont forget to postmap)
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+
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+ .dn42 out_dn42:
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+
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+This should to the trick for sending mails via your DN42-IP
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+
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+### Receiving emails
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+
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+The Domain mails should be received for has to be added to 'mydestination =' in main.cf
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