e_mail_session_send_to(): Don't silently ignore if we can't send.

If sending fails for any reason, return a suitable GError.  Don't just
return silently.  Also check for a wider range of errors indicating the
service is unavailable in composer_send_completed().  This will trigger
the "save-to-outbox" info alert.

(cherry picked from commit 13089f0d5088cf138697121a0839bd7d3ed85e42)

1 files changed, 18 insertions, 0 deletions

diff --git a/mail/em-composer-utils.c b/mail/em-composer-utils.c
index 3e2d3c3595..9edcb122a6 100644
--- a/mail/em-composer-utils.c
+++ b/mail/em-composer-utils.c
@@ -515,6 +515,7 @@ composer_send_completed (EMailSession *session,
                          AsyncContext *context)
 {
 	GError *error = NULL;
+	gboolean service_unavailable;
 	gboolean set_changed = FALSE;
 
 	e_mail_session_send_to_finish (session, result, &error);
@@ -525,6 +526,23 @@ composer_send_completed (EMailSession *session,
 		goto exit;
 	}
 
+	/* Check for error codes which may indicate we're offline
+	 * or name resolution failed or connection attempt failed. */
+	service_unavailable =
+		g_error_matches (
+			error, CAMEL_SERVICE_ERROR,
+			CAMEL_SERVICE_ERROR_UNAVAILABLE) ||
+		/* XXX camel_getaddrinfo() sets this, unfortunately. */
+		g_error_matches (error, CAMEL_ERROR, CAMEL_ERROR_GENERIC);
+	if (service_unavailable) {
+		/* Inform the user. */
+		e_alert_run_dialog_for_args (
+			GTK_WINDOW (context->composer),
+			"mail-composer:saving-to-outbox", NULL);
+		e_msg_composer_save_to_outbox (context->composer);
+		goto exit;
+	}
+
 	/* Post-processing errors are shown in the shell window. */
 	if (g_error_matches (error, E_MAIL_ERROR, E_MAIL_ERROR_POST_PROCESSING)) {
 		EAlert *alert;