[Fix] Do more heuristical detection for missing CTE

Issue: #1480

diff --git a/src/libmime/mime_parser.c b/src/libmime/mime_parser.c
index b445144e745132aa5ee1d0703bca0af5691536d0..c6c80e3f0988eb6af77a96284b3e5b2343f3b2fb 100644 (file)
--- a/src/libmime/mime_parser.c
+++ b/src/libmime/mime_parser.c
@@ -169,7 +169,9 @@ rspamd_mime_part_get_cte_heuristic (struct rspamd_task *task,
 
        while (p < end) {
                if (*p == '\r' || *p == '\n') {
-                       break;
+                       if (!b64_chars || n8bit || nspaces) {
+                               break;
+                       }
                }
                else if (*p == ' ') {
                        nspaces ++;