--- src/global/mail_queue.c-orig	2019-04-01 14:37:54.136169772 +0200
+++ src/global/mail_queue.c	2019-04-01 14:42:35.191382999 +0200
@@ -363,6 +363,14 @@
 	    break;
 	if (errno == EEXIST || errno == EISDIR)
 	    continue;
+	/*
+	 * Avoid getting into an infinite loop when we don't have permission to
+	 * read temp_path
+	 */
+	if (errno == EACCES) {
+	    msg_fatal("%s: create file %s: no permission", myname, STR(temp_path));
+	    break;
+	}
 	msg_warn("%s: create file %s: %m", myname, STR(temp_path));
 	sleep(10);
     }