Ability to disable server_name extension (RFC 6066)
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 665cdbf..bc7135e 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -596,7 +596,9 @@
     ssl_set_ca_chain( &ssl, &cacert, NULL, opt.server_name );
     ssl_set_own_cert( &ssl, &clicert, &rsa );
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
     ssl_set_hostname( &ssl, opt.server_name );
+#endif
 
     if( opt.mode == MODE_SSL_TLS )
     {