case SSL_ERROR_SSL:
{
uschar * s = US"SSL_accept";
- unsigned long e = ERR_peek_error();
- if (ERR_GET_REASON(e) == SSL_R_WRONG_VERSION_NUMBER)
+ int r = ERR_GET_REASON(ERR_peek_error());
+ if ( r == SSL_R_WRONG_VERSION_NUMBER
+#ifdef SSL_R_VERSION_TOO_LOW
+ || r == SSL_R_VERSION_TOO_LOW
+#endif
+ || r == SSL_R_UNKNOWN_PROTOCOL || r == SSL_R_UNSUPPORTED_PROTOCOL)
s = string_sprintf("%s (%s)", s, SSL_get_version(server_ssl));
(void) tls_error(s, NULL, sigalrm_seen ? US"timed out" : NULL, errstr);
return FAIL;