Hi Linus, Thanks for pointing it out, I'll try to do my best to avoid this in future. As I see now, in my case, the 'sender' in DKIM is triggered when using GMail with alien domain in "Send From:". I would not say that it is configuration "bug" (at least I can imagine why do they do that), but it definitely must be avoided for maillists. It is also interesting that if I use alien "From" email address with google-apps (g suite) domain, then GMail generated two DKIM-Signature headers, both for gmail.com and for the google-apps domain. 2018-08-09 22:31 GMT+03:00 Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>: > Matwey, > your DKIM signature is garbage, and it causes your emails to be > marked as spam when they go through a mailing list. > > The reason is this: > > DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; > d=gmail.com; s=20161025; > h=sender:from:to:cc:subject:date:message-id; > > where the problem is that the "sender" field is included in the DKIM > hash calculation. > > That is completely incorrect, since a mailing list will - by > definition - change the sender to the list, not the original sender. > > This is not a mailing list bug. This is a bug in your DKIM setup on > the sending side. > > I'm leaving everybody cc'd., because this problem is starting to be > annoyingly common. We had two people with chromium.org addresses with > the same misconfiguration, and I want people to be aware of this. > > I get too much email, and too much spam, and so when people have > misc-onfigured email sending that causes problems for spam systems, it > needs to get fixed. > > Your situation *may* be the same as the Chromium guys. Quoting Doug: > > "Looks like it's all fixed. Both Kees and I setup our chromium.org > accounts a long time ago. IIRC during that time the suggested way to > do things was that you'd use your @google.com SMTP settings even when > you were sending as your @chroumium.org account. These days it > doesn't appear that there's even any UI in gmail to configure things > that way, so presumably nobody else will be stuck in the same hole > that Kees and I were in" > > and he may have been wrong about that "presumably nobody else will be > stuck in the same hole" guess. > > So you might want to check what the SMTP settings are for your setup. > > Linus -- With best regards, Matwey V. Kornilov
