cmd/sgblog-comment-add/main.go | 1 +

diff --git a/cmd/sgblog-comment-add/main.go b/cmd/sgblog-comment-add/main.go
index aeeec69095f96150656f96e74d0d8f0eb49e77b01a1e9f25958e5593aca14d3a..17c12f91f44c958d45e560e1150ded1ffcf5ca1212c644984257e51b71fc794c 100644
--- a/cmd/sgblog-comment-add/main.go
+++ b/cmd/sgblog-comment-add/main.go
@@ -76,6 +76,7 @@ 	if len(body) == 0 {
 		log.Fatal("no body")
 	}
 
+	subj = strings.TrimPrefix(subj, "Re: ")
 	if h, err := hex.DecodeString(subj); err != nil || len(h) != sha1.Size {
 		os.Exit(0)
 	}