Replace with wildcards

src/freedombone-base-email

@@ -1042,6 +1042,14 @@ function email_smtp_proxy_through_isp {
         if [ ! "$isp_smtp_password" ]; then
             return
         fi
+        if [[ "$isp_smtp_domain" == 'mail.'* ]]; then
+            # shellcheck disable=SC2001
+            isp_smtp_domain=$(echo "$isp_smtp_domain" | sed 's|mail.|*.|g')
+        fi
+        if [[ "$isp_smtp_domain" == 'smtp.'* ]]; then
+            # shellcheck disable=SC2001
+            isp_smtp_domain=$(echo "$isp_smtp_domain" | sed 's|smtp.|*.|g')
+        fi
         { echo '# password file used when the local exim is authenticating to a remote';
           echo '# host as a client.';
           echo '#';