Support base64 encoded mail messages

[barart]

Some of the messages i send to ntfy are base64 encoded, this messages are not originated by me but by some external service that send me alerts by mail, as i dont want to receive this messages on my mail i send it to ntfy (via emal) so i can receive it on the ntfy app, however, some messages are base64 encoded and the ntfy app show them in this way instead of decode it, i would like that ntfy can show this messages on the app

[binwiederhier]

This is a reasonable ask. If you can provide a detailed example of the entire raw email as captured in the logs when log-level = TRACE, that'd be helpful for development. Thank you.

[barart]

This is a reasonable ask. If you can provide a detailed example of the entire raw email as captured in the logs when log-level = TRACE, that'd be helpful for development. Thank you.

Here you are with one message, i masked and deleted all the personal data, im waiting to receive a 2nd message that is different to this and have a different behaviour on ntfy:

2022/10/21 19:07:22 TRACE hostaname/xx.xxx.xx.xxx:xxxx SMTP DATA: X-Sender-Id:
 xXxXxXxXxX|x-authuser|sender@domain.xx
Received: from sender.hostname.tld (localhost [127.0.0.1])
    by sender.hostname.tld (Postfix) with ESMTP id xXXxxXxxXXxx;
    Fri, 21 Oct 2022 19:07:20 +0000 (UTC)
Received: from sender.hostname.tld (unknown [127.0.0.6])
    (Authenticated sender: xXxXxXxXxx)
    by sender.hostname.tld (Postfix) with ESMTPA id xxXxxXXxxXXx;
    Fri, 21 Oct 2022 19:07:19 +0000 (UTC)
ARC-Seal: i=1; s=arc-2022; d=domain.tld; t=1666379240; a=rsa-sha256;
    cv=none;
    b=xXxXxXxXxXxxXxxXx==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed;
 d=domain.tld;
    s=arc-2022; t=1666379240;
    h=from:from:reply-to:reply-to:subject:subject:date:date:
     message-id:message-id:to:to:cc:mime-version:mime-version:
     content-type:content-type:dkim-signature;
    bh=xXxXxXxXx=;
    b=xXxXxxXxxXXxXX==
ARC-Authentication-Results: i=1;
    rspamd-xXxXxxxXX-xxxxx;
    auth=pass smtp.auth=xxxxxx smtp.mailfrom=sender@domain.tld
X-Sender-Id:
 xXxXxXxX|x-authuser|sender@domain.tld
X-SR-Relay: Neutral
X-server-SenderId:
 xXXxxXxxXXxx|x-authuser|sender@domain.tld
X-Sever-Auth-Id: xxXxxXxx
X-Inform-Eight: xxxxXXxxx
X-SR-Loop-Signature: xxXXxxXXX
X-SR-Ingress-Time: 1666379240359
Received: from server.hostname.tld (server.hostname.tld [xxx.xxx.xx.xxx])
    (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384)
    by xxx.xxx.xxx.xxx (trex/6.7.1);
    Fri, 21 Oct 2022 19:07:20 +0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
    d=server.hostname.tld; s=default; h=Content-Type:Mime-Version:To:Subject:
    Reply-To:Message-Id:From:Date:Sender:Cc:Content-Transfer-Encoding:Content-ID:
    Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc
    :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:
    List-Subscribe:List-Post:List-Owner:List-Archive;
    bh=xxXXXXxXXXXXX=; b=xXXxxxXXXxXXXxxXXX==;
Received: from localhost ([127.0.0.1]:33812 helo=localhost.localdomain)
    by localhost.localdomain with esmtpa (Exim 4.95)
    (envelope-from <sender@domain.tld>)
    id xXxXXxX;
    Fri, 21 Oct 2022 14:07:18 -0500
Date: Fri, 21 Oct 2022 19:07:18 GMT
From: "Sender on domain.tld" <sender@domain.tld>
Message-Id: <xXXxxxXX@domain.tld>
Reply-To: "Sender on domain.tld" <sender@domain.tld>
Subject: [To NTFY] TEST MESSAGE.
To: xXxxxxXxxntfy@ntfyserver.tld
X-iContact_locale: en
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="mixed-Custom::Email::Object-11233-4555678910-0.123456478946"
X-AuthUser: XxxXxxXX@domain.tld

--mixed-Custom::Email::Object-xXxxXxxXxxXXX
Content-Type: multipart/alternative; boundary="alternative-Custom::Email::Object-xxxxxxxxxxxx"

--alternative-Custom::Email::Object-xxxxxxx
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Teste Message =E2=80=9Cto ntfy=E2=80=9D test test test.

Text text textText text textText text textText te =E2=80=9Ctexttexttexttext=E2=80=9D texttexttext.

mre text text text text text text =
text.
.....
.....
...............
.....

--alternative-Custom::Email::Object-xxxxxxx
Content-Type: multipart/related; boundary="related-Custom::Email::Object-xxxxxxxxxxx"

--related-Custom::Email::Object-xxxxxxx
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Message in HTML FORMAT<body> etc... 
...
...
...
...
..
...

--related-Custom::Email::Object-xxxxxxx
Content-Type: image/png; x-unix-mode=0600; name="image.png"
Content-Disposition: attachment; filename="image.png"
Content-ID: <auto_cid_xxxxxxx>
Content-Transfer-Encoding: base64

base64code=

--related-Custom::Email::Object-xxxxxxx--

--alternative-Customl::Email::Object-xxxxxxxx--

--mixed-Custom::Email::Object-xxxxxxxx
Content-Type: text/plain; charset="utf-8"; x-unix-mode=0600; name="filename.txt"
Content-Disposition: attachment; filename="filename.txt"
Content-Transfer-Encoding: base64

base64code==
--mixed-Custom::Email::Object-xxxxxxx--
2022/10/21 19:07:22 TRACE xxx.xx.xxxx HTTP GET /xxxxxxxxxxxxxxxxxxxx/sse Sending keepalive message
2022/10/21 19:07:22 DEBUG xx.xx.xx.xx HTTP POST /xxxxx Dispatching request
2022/10/21 19:07:22 TRACE xx.xx.xx.xx HTTP POST /xxxxx Entire request (headers and body):
POST /asgard HTTP/1.1
X-Forwarded-For: xx.xx.xx.xx
Title: [To NTFY] TEST MESSAGE.

i guess here is base64code ... (peeked 4096 bytes)
2022/10/21 19:07:22 DEBUG xxx.xxx.xxx.xxx/xxx/xxxxx Received message: event=message, body=29516 byte(s), delayed=false, firebase=true, cache=true, up=false, email=
2022/10/21 19:07:22 TRACE xxxxx.xxx.xxx.xx/xxx/xxxx Message body: {
  "id": "xxxxxxxx",
  "time": 1666379242,
  "event": "message",
  "topic": "xxxxx",
  "title": "[To NTFY] TEST MESSAGE.",
  "message": "Iguess is base64 code
2022/10/21 19:07:22 TRACE xxx.xx.xxx.x/xxxxx/xxxxx No stream or WebSocket subscribers, not forwarding
2022/10/21 19:07:22 DEBUG xxx.xx.xxx.x/xxxxx/xxxxx Publishing to Firebase
2022/10/21 19:07:22 TRACE xxx.xx.xxx.x/xxxxx/xxxxx Firebase message: {
  "topic": "xxxxx",
  "data": {
    "click": "",
    "encoding": "",
    "event": "message",
    "icon": "",
    "id": "xxxxx",
    "message": "i guess base64 code
2022/10/21 19:07:22 TRACE xxx.xx.xx.xx HTTP GET /xxxxxxxxxxxx/sse Sending keepalive message
2022/10/21 19:07:22 WARN xx.xx.xx.xx/xxxx/XxXXXXxxXX Unable to publish to Firebase: Request contains an invalid argument.

[binwiederhier]

So the title says you want the base64, but the excerpt here implies that you'll want the text/plain that's quoted-printable, i.e. this:

--alternative-Custom::Email::Object-xxxxxxx
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Teste Message =E2=80=9Cto ntfy=E2=80=9D test test test.

Text text textText text textText text textText te =E2=80=9Ctexttexttexttext=E2=80=9D texttexttext.

mre text text text text text text =
text.
.....
.....
...............
.....

Is this accurate? The base64-encoded multipart parts are attachments.

I gotta say, this multipart parsing is quite annoying and infinitely complex. I am not sure how deep I want to go with this, though I think I'd be able to pull of something that's practicable yet not too annoying to parse.

[binwiederhier]

Closing this due to inactivity. Feel free to reopen.