Am I missing some headers? On 05/10/2020 08:59, Michalis Kamprianis wrote:

this is a test

-- *Michalis Kamprianis* IT Security Manager SUSE LINUX, s. r. o. Corso II Křižíkova 148/34 18600 Praha 8 Tel: +420 702 133 218

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Hi I sent the same mail to the list and gmail. The mail that arrived to gmail had full and valid signatures, so can we check if the ML software removed the headers? On 05/10/2020 12:23, Per Jessen wrote:

Michalis Kamprianis wrote:

...

  Am I missing some headers?

Yes, I don't see any DKIM signature ?

* Per Jessen [01-01-70 12:34]:

Michalis Kamprianis wrote:

...

Am I missing some headers?

Yes, I don't see any DKIM signature ?

the original list was: "To: opensuse-test@opensuse.org and contained header: " X-Mailinglist: opensuse-test they are both different now, the X-Mai.. is missing -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.org openSUSE Community Member facebook/ptilopteri Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode

On Mon, Oct 5, 2020 at 8:25 AM Patrick Shanahan wrote:

* Per Jessen [01-01-70 12:34]:

...

Michalis Kamprianis wrote:

...

Am I missing some headers?

Yes, I don't see any DKIM signature ?

the original list was: "To: opensuse-test@opensuse.org and contained header: " X-Mailinglist: opensuse-test

they are both different now, the X-Mai.. is missing

That's intentional, the list names *are* all changing as part of switching systems. -- 真実はいつも一つ！/ Always, there's only one truth!

On 05/10/2020 14:45, Neal Gompa wrote:

On Mon, Oct 5, 2020 at 8:25 AM Patrick Shanahan wrote:

...

* Per Jessen [01-01-70 12:34]:

...

Michalis Kamprianis wrote:

...

Am I missing some headers?

Yes, I don't see any DKIM signature ?

the original list was: "To: opensuse-test@opensuse.org and contained header: " X-Mailinglist: opensuse-test

they are both different now, the X-Mai.. is missing

That's intentional, the list names *are* all changing as part of switching systems.

does anyone see any DKIM headers in mails coming from that list? I sent the same message to the list and to my personal email address. The mail that reached my personal email address has all headers. The mail that reached me through the list, is missing at least the DKIM header (I didn't check for more).

Michalis Kamprianis wrote:

does anyone see any DKIM headers in mails coming from that list? I sent the same message to the list and to my personal email address. The mail that reached my personal email address has all headers. The mail that reached me through the list, is missing at least the DKIM header (I didn't check for more).

On the initial message, sent to mx[12].o.o there must have been a DKIM signature, because: X-Spam-Status: ... tests=DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, We (mx[12].o.o) then send it on to mailman3 and what comes out no longer has any DKIM signature. It has to be mailman3 that removes it. -- Per Jessen, Zürich (15.0°C) http://www.hostsuisse.com/ - virtual servers, made in Switzerland.

On 06/10/2020 08.58, Michalis Kamprianis wrote:

On 05/10/2020 15:44, Per Jessen wrote:

...

We (mx[12].o.o) then send it on to mailman3 and what comes out no longer has any DKIM signature. It has to be mailman3 that removes it.

I do remember mailman has several options, with or without changing the sender (From: field). If one changes the sender to be the mailing list, then the whole DMARC / DKIM policy applies to the mailing list and other DKIM headers are ignored / not taken into account and can be removed. But if the sender remains the same, as I see in this mailing list, then the DMARC policy of the sender domain is evaluated and removing DKIM sigs has the same effect as invalidating.

Right; the Lazarus list, for instance, does this. They would set: From: Some Name via lazarus To: Lazarus mailing list Cc: Some Name <...@gmail.com> ... DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lists.lazarus-ide.org; s=list; t=1598769060; bh=vCBCO/qff4ZY8SmAYVhHnrPaI2QzV8IWQtgzF+8dPUU=; h=References:In-Reply-To:Date:To:Subject:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=dHl60l1p4U61ZxFSp6D5m7cYls6GdHLffPEmCyhEsWZjxnm5cYQZqPSpskpph+QCK dfMS3Q+Qi2NpA0w5e9qt5qah8exEFdh77lHkQAXKAH4fo1mot9bce1gVhqmyy5aHis njxadSBKQdIwTBpHongmb1aundceGsT+q7yKkxj4= ... Authentication-Results: server.lazarus-ide.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=W7itatBR; dkim-atps=neutral ... X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=JGCg0OYS4jqnIN4aNgMrC0SDYFTPhP7RNDw5kGy5n/w=; b=hC1mw9hwBbpH+PqQZk7aoGsj7uXeHPao9rI4/DT6sz0g0fRPwQCl8fNSE8lKisLe5E RKpPqe6TRhKzcl6W/qofxyXxl/RFQSztNTCplk9Ya6nK1KE1SoQcMSu3TGBZjtsNTOAv IESC5zralhrrz8Faw9Pov/fjxVd66drzodWkEw25dYyBpPxogbEf4KrBPN4SFtrmYaeV GYDHEmj9yFHk0ncneYCp1yI7DJJJnzhjjXcp6mwJPWqx09IwQkr1T/opED3JnOgYTVPi kVBPolzmRf6k5xeD8eSD6o1ljhu55ULvRO9IDhejaW7CuPluyFLz8v5J+Kg30TsMwcQk T3tA== ... X-TnetIn-SpamCheck: no es spam, clean DKIM_NONE SPF_PASS X-TnetIn-From: lazarus-bounces@lists.lazarus-ide.org X-Spam-Status: No I think that the "X-Google-DKIM-Signature" is the original sender's. -- Cheers / Saludos, Carlos E. R. (from 15.1 x86_64 at Telcontar)