Install spf-tools-perl by entering the following commands in the terminal:
sudo apt update sudo apt install spf-tools-perl
Description:
SPF tools (spfquery, spfd) based on the Mail::SPF Perl module
A collection of Sender Policy Framework (SPF) tools that are based on the fully RFC-conforming Mail::SPF Perl module. The following tools are included in this package: . * spfquery: A command-line tool for performing SPF checks. * spfd: A daemon for services that perform SPF checks frequently.
Homepage: https://metacpan.org/release/Mail-SPF
Version: 2.9.0-4
Section: universe/mail