commit 3d3c804046b6af0009a4393aaeef873bc60cc199
from: Martijn van Duren <martijn@openbsd.org>
date: Tue Sep 17 11:48:34 2019 UTC

Signature is with a capital S. Fixes google fuckup

commit - fe371fc9cc4ef64169b33e6a02b6b37a26bbc86d
commit + 3d3c804046b6af0009a4393aaeef873bc60cc199
blob - 0ee853af531167044f8e3c0c723db75fafa4ea51
blob + 067c71b06ad1ea0df8fc7b69e999e6b2b39067ab
--- main.c
+++ main.c
@@ -276,7 +276,7 @@ dkim_message_new(struct osmtpd_ctx *ctx)
 	message->err = 0;
 
 	if (!dkim_signature_printf(message,
-	    "DKIM-signature: v=%s; a=%s-%s; c=%s/%s; d=%s; s=%s; ", "1",
+	    "DKIM-Signature: v=%s; a=%s-%s; c=%s/%s; d=%s; s=%s; ", "1",
 	    cryptalg, hashalg,
 	    canonheader == CANON_SIMPLE ? "simple" : "relaxed",
 	    canonbody == CANON_SIMPLE ? "simple" : "relaxed",