[Update] Configure SPF and DKIM in Postfix on Debian 9 #2182
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This update creates a new version of our old Debian 8 guide with one major fix. In
opendkim.confwe added a setting for the socket file and another for the Pid file. This allowed the opendkim daemon to run, as it would not start otherwise.For anyone who runs this guide, it is not uncommon for the report from port25 (that you receive via e-mail) to say that SPF is failing one minute, and passing another. It is believed that this is because the DNS servers have not all updated. It could take up to a day for the DNS servers to come to a consensus.