To keep things simple don't treat the default domain name as a special snowflake

src/freedombone-app-mailpile

     rm /etc/systemd/system/mailpile.service
 
     read_config_param "MAILPILE_DOMAIN_NAME"
-    if [[ "$MAILPILE_DOMAIN_NAME" != "$DEFAULT_DOMAIN_NAME" ]]; then
-        nginx_dissite $MAILPILE_DOMAIN_NAME
-        remove_certs ${MAILPILE_DOMAIN_NAME}
-        if [ -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME ]; then
-            rm -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME
-        fi
-        if [ -d /var/www/$MAILPILE_DOMAIN_NAME ]; then
-            rm -rf /var/www/$MAILPILE_DOMAIN_NAME
-        fi
-        function_check remove_ddns_domain
-        remove_ddns_domain $MAILPILE_DOMAIN_NAME
-        deluser --remove-all-files mailpile
-    else
-        deluser mailpile
+    nginx_dissite $MAILPILE_DOMAIN_NAME
+    remove_certs ${MAILPILE_DOMAIN_NAME}
+    if [ -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME ]; then
+        rm -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME
     fi
+    if [ -d /var/www/$MAILPILE_DOMAIN_NAME ]; then
+        rm -rf /var/www/$MAILPILE_DOMAIN_NAME
+    fi
+    function_check remove_ddns_domain
+    remove_ddns_domain $MAILPILE_DOMAIN_NAME
+    deluser --remove-all-files mailpile
 
     remove_config_param MAILPILE_DOMAIN_NAME
     remove_config_param MAILPILE_CODE
     # create folders and tags
     su -c "cd /var/www/$MAILPILE_DOMAIN_NAME/htdocs && ./mp --setup" - mailpile
 
-    if [[ $ONION_ONLY == 'no' ]]; then
-        if [[ "$MAILPILE_DOMAIN_NAME" == "$DEFAULT_DOMAIN_NAME" ]]; then
-            su -c "cd /var/www/$MAILPILE_DOMAIN_NAME/htdocs && ./mp set sys.http_path /mail" - mailpile
-        fi
-    fi
-
     echo '[Unit]' > /etc/systemd/system/mailpile.service
     echo 'Description=Mailpile Email Client' >> /etc/systemd/system/mailpile.service
     echo 'After=syslog.target network.target nginx.target' >> /etc/systemd/system/mailpile.service
     fi
 
     function_check create_site_certificate
-    if [[ "$MAILPILE_DOMAIN_NAME" == "$DEFAULT_DOMAIN_NAME" ]]; then
-        if [ ! -f /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem ]; then
-            create_site_certificate $MAILPILE_DOMAIN_NAME 'yes'
-        fi
-    else
+    if [ ! -f /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem ]; then
         create_site_certificate $MAILPILE_DOMAIN_NAME 'yes'
     fi