Revert 57c29c14a4

Apparently this causes outlook.com messages to be rejected
even though they don't use `l=` tag.

CHANGELOG.md

@@ -5,9 +5,6 @@
 - Test and fix for attempts to create inadmissible accounts 
   ([#333](https://github.com/deltachat/chatmail/pull/321))
 
-- Reject DKIM signatures that do not cover the whole message body.
-  ([#321](https://github.com/deltachat/chatmail/pull/321))
-
 - check that OpenPGP has only PKESK, SKESK and SEIPD packets
   ([#323](https://github.com/deltachat/chatmail/pull/323),
    [#324](https://github.com/deltachat/chatmail/pull/324))

cmdeploy/src/cmdeploy/opendkim/final.lua

@@ -19,11 +19,7 @@ for i = 1, nsigs do
 	-- Any valid signature that was not ignored like this
 	-- means the message is acceptable.
 	if sigres == 0 then
-		-- Do not accept the signature if it does not cover the whole body
-		-- of the message by using `l=` tag.
-		if odkim.sig_canonlength(ctx, sig) < odkim.sig_bodylength(ctx, sig) then
-			return nil
-		end
+		return nil
 	end	
 end