Simulate a black hole for a domain with Postfix
From Deimos.fr / Bloc Notes Informatique
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| Software version | 2.10 |
|---|---|
| Operating System | Debian 7 |
| Website | Postfix Website |
| Last Update | 07/05/2013 |
| Others | |
1 Introduction
When you manage outgoing emails through SMTP, you may sometimes need to test if a service is able to send correctly emails and itself check that there were no issue during sending. You can create a black hole for a specific domain and Postfix will answer from the same manner as if it is ok. It also permit to test Postfix sending capacities on a server.
2 Installation
Of course you need Postfix :
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aptitude install postfix |
3 Configuration
In the Postfix main configuration, add transport map line :
 /etc/postfix/main.cf
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[...] transport_maps = dbm:/etc/postfix/blackhole_map [...] |
Now add the fake domain to the transport map file :
| /etc/postfix/blackhole_map
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blackhole.com discard:silently |
Let's generate the map now :
| postmap
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postmap -c /etc/postfix /etc/postfix/blackhole_map |
Now restart postfix and you will see in your logs something like this :
postfix/discard[1435]: [ID 897546 mail.info] 4D847A5B: to=<john@blackhole.com>, relay=none, delay=13, delays=13/0/0/0, dsn=2.0.0, status=sent (silently)
4 References
http://www.memoire-partagee.fr/2011/01/smtp-sortant-faire-un-trou-noir-avec-postfix/
