dkim spf email validation for exim4

assets/exim4_dkim.conf

@@ -0,0 +1,4 @@
+DKIM_CANON = relaxed
+DKIM_SELECTOR = DATE_TO_CHANGE
+DKIM_DOMAIN = DOMAIN_TO_CHANGE
+DKIM_FILE = /etc/exim4/dkim/DOMAIN_TO_CHANGE-private.pem

install-debian-server.sh

@@ -141,6 +141,42 @@ echo "\033[35;1mEnable mail sending for php \033[0m"
 # http://www.sycha.com/lamp-setup-debian-linux-apache-mysql-php#anchor13
 sleep 3
 dpkg-reconfigure exim4-config
+service exim4 restart
+
+# dkim spf
+# https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
+echo "\033[35;1mConfiguring DKIM \033[0m"
+while [ "$installdkim" != "y" ] && [ "$installdkim" != "n" ]
+do
+echo -n "Should we install dkim for exim4 ? [y|n] "
+read installdkim
+done
+if [ "$installdkim" = "y" ]; then
+  echo -n "Choose a domain for dkim: "
+  read domain
+  selector=$(date +%Y%m%d)
+
+  mkdir /etc/exim4/dkim
+  openssl genrsa -out /etc/exim4/dkim/"$domain"-private.pem 1024 -outform PEM
+  openssl rsa -in /etc/exim4/dkim/"$domain"-private.pem -out /etc/exim4/dkim/"$domain".pem -pubout -outform PEM
+  chown root:Debian-exim /etc/exim4/dkim/"$domain"-private.pem
+  chmod 440 /etc/exim4/dkim/"$domain"-private.pem
+
+  cp "$_cwd"/assets/exima4_dkim.conf /etc/exim4/conf.d/main/00_local_macros
+  sed -ir "s/DOMAIN_TO_CHANGE/$domain/g" /etc/exim4/conf.d/main/00_local_macros
+  sed -ir "s/DATE_TO_CHANGE/$selector/g" /etc/exim4/conf.d/main/00_local_macros
+
+  update-exim4.conf
+  service exim4 restart
+  echo "please create a TXT entry in your dns zone : $selector._domainkey.$domain \n"
+  echo "your public key is : \n"
+  cat /etc/exim4/dkim/"$domain".pem
+  echo "press any key to continue."
+  read continu
+else
+  echo 'dkim not installed'
+fi
+
 
 
 echo '\033[35m