diff -urN ../exim-4.94.orig/src/match.c ./src/match.c
--- ../exim-4.94.orig/src/match.c	2020-05-30 23:35:38.000000000 +0300
+++ ./src/match.c	2020-06-06 18:26:09.324381000 +0300
@@ -1080,7 +1080,7 @@
   {
   int watchdog = 50;
   uschar *list, *ss;
-  uschar buffer[1024];
+  uschar buffer[2048];
 
   if (sdomain == subject + 1 && *subject == '*') return FAIL;