+#if defined (USE_LIBESMTP) && (defined (USE_SSL) || defined (USE_GNUTLS))
+int mutt_libesmtp_check_usetls (const char* option, unsigned long p,
+ char* errbuf, size_t errlen) {
+ char* val = (char*) p;
+ if (m_strisempty(val))
+ return (1);
+ if (m_strncmp(val, "enabled", 7) != 0 &&
+ m_strncmp(val, "required", 8) != 0) {
+ if (errbuf)
+ snprintf (errbuf, errlen, _("'%s' is invalid for %s"), val, option);
+ return (0);
+ }
+ return (1);
+}
+#endif
+