New issue by rapenne-s on mblaze repository https://github.com/leahneukirchen/mblaze/issues/257 Description: hi, when I apply `mmime` on an email sent from tuta.io, a newline is added to the field Dkim-signature which breaks the email my sample email to reproduce it (I slightly modified the original to redact some addresses) ``` Return-Path: Delivered-To: solene Received: from localhost by smth.redacted.something with LMTP id 9oG6LQu97GVYPQAA23Ik0Q (envelope-from ) for ; Sat, 09 Mar 2024 20:48:27 +0100 Return-Path: Delivered-To: contact@redacted.something Received: from w1.tutanota.de (w1.tutanota.de [81.3.6.162]) by smth.redacted.something (OpenSMTPD) with ESMTPS id 51454e78 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Sat, 9 Mar 2024 20:48:26 +0100 (CET) Received: from tutadb.w10.tutanota.de (unknown [192.168.1.10]) by w1.tutanota.de (Postfix) with ESMTP id 6F6DCFBFC70 for ; Sat, 9 Mar 2024 19:48:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1710013705; s=s1; d=tuta.io; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Cc:Date:Date:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:Sender; bh=Jr8DQlZ7RwdJv94m7ZT/v+cv/WFsgjxpMRsHvnNfgGY=; b=NXRl0YxYtVsWrR8v7tVKnvsnCSrBqqaf2h3m8OVGlzG0OqMqGcWg7fVk6x4nTYV+ +05afZrGfIwcfFwIe/LLvT0d3/12t4+cs/FQvmEcFUN+n2buQwt5sn8f76UUlvNMrGz Xbq8HAdwhA364yWABa7DrF1EGysC8bEDJcCtSs/Wz3TL2A/MEeItEF+VijtgWUwoOwn rFKkCg5Df+IOd4gEBS/KYLbzcMB1dvqy+ut2LA2+NZpzJQPgbJzWAYieT9KYgoS+hKS 5FfknNT+hKZz18IBEWH1UWbI+CcLRR8Sr80x2DZUKq8ryC5RmV5/uAc5Up03b/KZGRU NsiBAQCx3w== Date: Sat, 9 Mar 2024 20:48:25 +0100 (CET) From: test@tuta.io To: Contact Message-ID: Subject: test MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_417017_2033693008.1710013705448" ------=_Part_417017_2033693008.1710013705448 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit test -- ------=_Part_417017_2033693008.1710013705448 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

test

------=_Part_417017_2033693008.1710013705448-- ``` If you pipe it to `mmime` you obtain this result: ``` Return-Path: Delivered-To: solene Received: from localhost by smth.redacted.something with LMTP id 9oG6LQu97GVYPQAA23Ik0Q (envelope-from ) for ; Sat, 09 Mar 2024 20:48:27 +0100 Return-Path: Delivered-To: contact@redacted.something Received: from w1.tutanota.de (w1.tutanota.de [81.3.6.162]) by smth.redacted.something (OpenSMTPD) with ESMTPS id 51454e78 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Sat, 9 Mar 2024 20:48:26 +0100 (CET) Received: from tutadb.w10.tutanota.de (unknown [192.168.1.10]) by w1.tutanota.de (Postfix) with ESMTP id 6F6DCFBFC70 for ; Sat, 9 Mar 2024 19:48:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1710013705; s=s1; d=tuta.io; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Cc:Date:Date:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:Sender; bh=Jr8DQlZ7RwdJv94m7ZT/v+cv/WFsgjxpMRsHvnNfgGY=; b=NXRl0YxYtVsWrR8v7tVKnvsnCSrBqqaf2h3m8OVGlzG0OqMqGcWg7fVk6x4nTYV+ +05afZrGfIwcfFwIe/LLvT0d3/12t4+cs/FQvmEcFUN+n2buQwt5sn8f76UUlvNMrGz Xbq8HAdwhA364yWABa7DrF1EGysC8bEDJcCtSs/Wz3TL2A/MEeItEF+VijtgWUwoOwn rFKkCg5Df+IOd4gEBS/KYLbzcMB1dvqy+ut2LA2+NZpzJQPgbJzWAYieT9KYgoS+hKS 5FfknNT+hKZz18IBEWH1UWbI+CcLRR8Sr80x2DZUKq8ryC5RmV5/uAc5Up03b/KZGRU NsiBAQCx3w== Date: Sat, 9 Mar 2024 20:48:25 +0100 (CET) From: test@tuta.io To: Contact Message-ID: Subject: test MIME-Version: 1.0 boundary="----=_Part_417017_2033693008.1710013705448" MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----_=_3e0505e6347f3ecf153c1566_=_" This is a multipart message in MIME format. ------_=_3e0505e6347f3ecf153c1566_=_ Content-Type: multipart/alternative; Content-Disposition: inline Content-Transfer-Encoding: quoted-printable ------=3D_Part_417017_2033693008.1710013705448 Content-Type: text/plain; charset=3DUTF-8 Content-Transfer-Encoding: 7bit test --=20 ------=3D_Part_417017_2033693008.1710013705448 Content-Type: text/html; charset=3DUTF-8 Content-Transfer-Encoding: 7bit

test

-= -

------=3D_Part_417017_2033693008.1710013705448-- ------_=_3e0505e6347f3ecf153c1566_=_-- ```