Fix #965 Don't delete CAA records when delelte webmail ssl

bin/v-delete-letsencrypt-domain

@@ -60,10 +60,20 @@ check_hestia_demo_mode
 if [ -n "$DNS_SYSTEM" ]; then
     dns_domain=$($BIN/v-list-dns-domains "$user" | grep "$domain" | cut -d' ' -f1)
     caa_record=$($BIN/v-list-dns-records "$user" "$domain" | grep -i "letsencrypt" | cut -d' ' -f1)
-
+    
     if [ "$dns_domain" = "$domain" ]; then
         if [ -n "$caa_record" ]; then
-            $BIN/v-delete-dns-record "$user" "$domain" "$caa_record"
+            if [ -z "$mail" ]; then
+                mail_exists=$(is_object_value_exist 'mail' 'DOMAIN' "$domain" '$LETSENCRYPT');
+                if [ "$mail_exists" != '' ]; then
+                    $BIN/v-delete-dns-record "$user" "$domain" "$caa_record"
+                fi
+            else
+                web_exists=$(is_object_value_exist 'web' 'DOMAIN' "$domain" '$LETSENCRYPT');
+                if [ "$web_exists" != '' ]; then
+                    $BIN/v-delete-dns-record "$user" "$domain" "$caa_record"
+                fi
+            fi
         fi
     fi
 fi