Postfix
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Adding SPF checking to incoming mail on Postfix (Ubuntu 16.04)
Install the required packages: apt-get install postfix-policyd-spf-python postfix-pcre Our server runs amavis-new, so we don’t want postfix to reject the mail outright but rather mark the headers so we need to edit some settings in the file: /etc/postfix-policyd-spf-python/policyd-spf.conf HELO_reject default option is SPF_Not_Pass The options available to us are: SPF_Not_Pass (default) – Reject if result…