Install sa-exim by entering the following commands in the terminal:
sudo apt update sudo apt install sa-exim
Description:
SpamAssassin filter for Exim
SA-Exim integrates SpamAssassin filtering at SMTP time with the Exim v4 MTA. It may be used to reject incoming mails before they arrive, or even to tie up the sender's resources by slowing down the connection ("teergrubing"). . Most of the functionality of this package can also be achieved using the exiscan ACL conditions built into the "heavy" Exim daemon, exim-daemon-heavy. Use this package if you need SpamAssassin's report_safe feature, or if you want to have easier control over the header fields added, without using the report template to add multiple fields.
Homepage: http://marc.merlins.org/linux/exim/sa.html
Version: 4.2.1-16
Section: universe/mail