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Here's the relevant headers from a recent email from Apple, including the Authentication-Results and Received-SPF lines: Delivered-To: (ME)@gmail.com Recei

by Samon 8y ago

Here's the relevant headers from a recent email from Apple, including the Authentication-Results and Received-SPF lines: Delivered-To: (ME)@gmail.com Received: by 2002:a9d:650d:0:0:0:0:0... Received: from sender-of-f72.zoho.com (sender-of-f72.zoho.com. [135.84.80.227]) by mx.google.com... Received-SPF: pass (google.com: domain of (ME)+aml_=(MY DOMAIN)=gmail.com@(MY DOMAIN) designates 135.84.80.227 as permitted sender) client-ip=135.84.80.227; Authentication-Results: mx.google.com; dkim=pass header.i=@id.apple.com header.s=id0517 header.b=S5Hlyy1T; spf=pass (google.com: domain of (ME)+aml_=(MY DOMAIN)=gmail.com@(MY DOMAIN) designates 135.84.80.227 as permitted sender) smtp.mailfrom="(ME)+aml_=(MY DOMAIN)=gmail.com@(MY DOMAIN)"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=id.apple.com Received-SPF: pass (zoho.com: domain of email.apple.com designates 17.151.1.66 as permitted sender) client-ip=17.151.1.66; envelope-from=uatdsasadmin@email.apple.com; helo=nwk-txn-msbadger0405.apple.com; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zoho.com: domain of email.apple.com designates 17.151.1.66 as permitted sender) smtp.mailfrom=uatdsasadmin@email.apple.com; dmarc=pass(p=reject dis=none) header.from=id.apple.com Received: from nwk-txn-msbadger0405.apple.com (nwk-txn-msbadger0405.apple.com [17.151.1.66]) by mx.zohomail.com... From: Apple <appleid@id.apple.com>

deanmoriarty 8y ago
Thanks, really appreciate you taking the time to extract those headers, very helpful. Looking at the headers, it seems clear that the Zoho mail server does something different when forwarding the message: it also sets some parts of the headers (like smtp.mailfrom) to instruct the recipient mail server that the mail is sent from your email address, and not really from @id.apple.com. Google then validates not @id.apple.com, but (ME)+aml_=(MY DOMAIN)=gmail.com@(MY DOMAIN), which makes it work. I will ask Gandi support. Edit: after doing some research, it appears Zoho is implementing SRS (http://www.openspf.org/SRS http://www.openspf.org/SRS) as the diagrams in the web page show, whereas Gandi is not. I just learned a new thing! Thanks again.
- Samon 8y ago
  I've just learned something too :) I've known for years it "just works", but now I know why :D

by Samon 8y ago

deanmoriarty 8y ago

Thanks, really appreciate you taking the time to extract those headers, very helpful. Looking at the headers, it seems clear that the Zoho mail server does something different when forwarding the message: it also sets some parts of the headers (like smtp.mailfrom) to instruct the recipient mail server that the mail is sent from your email address, and not really from @id.apple.com. Google then validates not @id.apple.com, but (ME)+aml_=(MY DOMAIN)=gmail.com@(MY DOMAIN), which makes it work. I will ask Gandi support. Edit: after doing some research, it appears Zoho is implementing SRS (http://www.openspf.org/SRS http://www.openspf.org/SRS) as the diagrams in the web page show, whereas Gandi is not. I just learned a new thing! Thanks again.

Samon 8y ago
I've just learned something too :) I've known for years it "just works", but now I know why :D