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>