Postfix/Postgrey

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Revision as of 18:36, 28 November 2016 by MichaelRpdx (talk | contribs) (Add reminder about --inet and --unix not working together, postfix uses the socket implementation.)
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Notes: Short enough, and Postfix is already listing other addons. (Discuss in Talk:Postfix/Postgrey#)

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Reason: See Help:Style. (Discuss in Talk:Postfix/Postgrey#)

Postgrey can be used to enable greylisting for a Postfix mail server.

Installation

Install the postgrey package. To get it running quickly edit the Postfix configuration file and add these lines:

/etc/postfix/main.cf
smtpd_recipient_restrictions =
  check_policy_service inet:127.0.0.1:10030

Then start/enable the postgrey service. Afterwards, reload the postfix service. Now greylisting should be enabled.

Configuration

Configuration is done via editing the greylist.service file. First copy it over to edit it.

# cp /usr/lib/systemd/system/postgrey.service /etc/systemd/system/

Now you can edit it. For example, to add automatic whitelisting (successful deliveries are whitelisted and don't have to wait any more), you could add the --auto-whitelist-clients=N option and replace N by a suitably small number (or leave it at its default of 5).

Troubleshooting

If you specify --unix=/path/to/socket and the socket file is not created ensure you have removed the default --inet=127.0.0.1:10030 from the service file.

For a full documentation of possible options see perldoc postgrey.