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 build-essential
 curl
 cpanminus
 git
 pyzor
 razor
 subversion
 libdb-dev
 libdbi-dev
 libidn11-dev
 libidn2-dev
 libmaxminddb-dev
 libssl-dev
 zlib1g-dev
 poppler-utils
 tesseract-ocr

 libarchive-zip-perl
 libberkeleydb-perl
 libbsd-resource-perl
 libdbi-perl
 libdigest-sha-perl
 libencode-detect-perl
 libgeo-ip-perl
 libgeoip2-perl
 libio-compress-perl
 libio-socket-inet6-perl
 libio-socket-ssl-perl
 libio-string-perl
 libmail-dkim-perl
 libmail-spf-perl
 libnet-patricia-perl
 libnet-dns-perl
 libnetaddr-ip-perl
 libfile-sharedir-install-perl
 libtest-exception-perl
 libregexp-common-perl
 libxml-libxml-perl
 libsocket6-perl
 libsys-hostname-long-perl
 libtest-pod-coverage-perl
 libtest-pod-perl
 libdbd-sqlite2-perl
 libdbd-sqlite3-perl
 libdevel-cycle-perl
 libemail-address-xs-perl
 libgeography-countries-perl
 libtest-perl-critic-perl
 libconfig-tiny-perl
 libdbix-simple-perl
 libemail-mime-perl
 libemail-sender-perl
 libemail-simple-perl
 libnet-idn-encode-perl
 libtest-file-sharedir-perl
 libtest-output-perl
 libnet-imap-simple-perl
 libnet-smtps-perl
 libtext-diff-perl

Install the following packages from CPAN which do not have equivalent apt packages on Ubuntu already.
The -S option causes the installation step to be run as root using sudo.

    cpanm -S Digest::SHA1 IP::Country::DB_File IP::Country Mail::DMARC::PurePerl Net::LibIDN2 \
     Perl::Critic::Policy::Bangs::ProhibitBitwiseOperators Perl::Critic::Policy::Perlsecret \
     Perl::Critic::Policy::Compatibility::ProhibitThreeArgumentOpen \
     Perl::Critic::Policy::Lax::ProhibitStringyEval::ExceptForRequire \
     Perl::Critic::Policy::ValuesAndExpressions::PreventSQLInjection \
     Perl::Critic::Policy::ControlStructures::ProhibitReturnInDoBlock

Install dcc from source: Get the source from the link at https://www.dcc-servers.net/dcc/ and 

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Initialize the razor installation by running once (not as root) after razor is installed
  razor-admin -create-create  
  razor-admin --register

Now that everything is installed, verify that you have a working build and test environment by downloading
the trunk svn working directory, build it, and run tests.

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The following commands in a terminal shell will download and install plenv into your home directory, install perl 5.16.3,
cpanm,
and all the CPAN modules required for SpamAssassin building and testing.
After running this, log out of Ubuntu and log back in again to get the new environment with the perl 5.16.3,
cd to the working directory
and rebuild SpamAssassin starting with the perl Makefile.PL command.

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git clone https://github.com/tokuhirom/plenv.git ~/.plenv
git clone https://github.com/tokuhirom/Perl-Build.git ~/.plenv/plugins/perl-build/
echo 'export PATH="$HOME/.plenv/bin:$PATH"' >> ~/.profile
echo 'eval "$(plenv init -)"' >> ~/.profile
export PATH="$HOME/.plenv/bin:$PATH"
eval "$(plenv init -)"
plenv install 5.16.3
plenv rehash
plenv global 5.16.3
perl -v
plenv install-cpanm

cpanm HTML::Parser Net::DNS NetAddr::IP Archive::Zip BSD::Resource BerkeleyDB Compress::Zlib DBI DB_File Devel::Cycle \
Digest::SHA Digest::SHA1 DigestEmail::Address::SHA DB_File Mail::SPFXS Encode::Detect Encode::Detect::Detector \
Geo::IP GeoIP2 GeoIP2::Database::Reader GeoGeography::Countries HTML::IPParser IPHTTP::CountryCookies \
HTTP::DB_FileDaemon NetHTTP::CIDRDate HTTP::LiteNegotiate \
IO::Socket::INET6 IO::Socket::SSL Mail::DKIM DBI IO::String \
IP::Country IP::Country::DB_File LWP::Protocol::https LWP::UserAgent HTTPMail::DateDKIM \
Encode::Detect::DetectorMail::DMARC::PurePerl Math::Int128 MaxMind::DB::Reader::XS Net::CIDR::Lite Net::PatriciaDNS \
Net::DNS::Nameserver \
BSDNet::ResourceLibIDN ArchiveNet::ZipLibIDN2 IONet::CompressPatricia IONet::String BerkeleyDB BSDWorks::ResourceNetwork DBI EncodeNetAddr::DetectIP \
MailParams::Validate Razor2::Client::DKIMAgent Sys::Hostname::Long Test::PodPerl::CoverageCritic Test::Pod \
DevelTest::Pod::SawAmpersandCoverage MailWWW::DMARCRobotRules Text::PurePerl Devel::Cycle Email::Address::XS \
Geography::Countries IP::Country Math::Int128 Net::Works::Network Net::LibIDN2 \
Net::LibIDN MaxMind::DB::Reader::XS Test::Perl::CriticDiff \
Perl::Critic::Policy::Bangs::ProhibitBitwiseOperators Perl::Critic::Policy::Perlsecret \
Perl::Critic::Policy::Compatibility::ProhibitThreeArgumentOpen \
Perl::Critic::Policy::Lax::ProhibitStringyEval::ExceptForRequire \
Perl::Critic::Policy::ValuesAndExpressions::PreventSQLInjection \
Perl::Critic::Policy::ControlStructures::ProhibitReturnInDoBlock

cpanm Mail::SPF -n --install-args="--install_path sbin=$HOME/bin" 

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