[About XDA developers] rovo89:
Thanks, it seems to work fine now! :)

Here is another potential issue. I had three notification mails from XDA in my spam folder today. I can't remember this happening before.

Here is one that came through just fine:

Delivered-To: xxxxxxx
Received: by 10.216.210.73 with SMTP id t51csp145954weo;
Tue, 12 Nov 2013 07:36:56 -0800 (PST)
X-Received: by 10.60.65.37 with SMTP id u5mr7126308oes.72.1384270615841;
Tue, 12 Nov 2013 07:36:55 -0800 (PST)
Return-Path: <www@doubleshot.php.va.us.xda-developers.com>
Received: from doubleshot.php.va.us.xda-developers.com (doubleshot.php.va.us.xda-developers.com. [207.244.72.15])
by mx.google.com with ESMTP id iz10si18149357obb.0.2013.11.12.07.36.55
for <xxxxxxx>;
Tue, 12 Nov 2013 07:36:55 -0800 (PST)
Received-SPF: pass (google.com: best guess record for domain of www@doubleshot.php.va.us.xda-developers.com designates 207.244.72.15 as permitted sender) client-ip=207.244.72.15;
Authentication-Results: mx.google.com;
spf=pass (google.com: best guess record for domain of www@doubleshot.php.va.us.xda-developers.com designates 207.244.72.15 as permitted sender) smtp.mail=www@doubleshot.php.va.us.xda-developers.com
Received: by doubleshot.php.va.us.xda-developers.com (Postfix, from userid 500)
id 1179D74C0BE8; Tue, 12 Nov 2013 10:36:55 -0500 (EST)
To: xxxxxxx
Subject: Reply to thread '[FRAMEWORK ONLY!] Xposed - ROM modding without modifying APKs (2.3.1)(10.10.2013)'
From: "xda-developers" <webmaster@xda-developers.com>
Auto-Submitted: auto-generated
Message-ID: <20131112153655.8e1406787d00@xdaforums.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-Mailer: vBulletin Mail via PHP
Date: Tue, 12 Nov 2013 10:36:55 -0500 (EST)

And this one was blocked:

Delivered-To: xxxxxxxx
Received: by 10.216.210.73 with SMTP id t51csp138337weo;
Tue, 12 Nov 2013 05:45:47 -0800 (PST)
X-Received: by 10.236.144.103 with SMTP id m67mr168109yhj.146.1384263946384;
Tue, 12 Nov 2013 05:45:46 -0800 (PST)
Return-Path: <www@saga.php.va.us.xda-developers.com>
Received: from saga.php.va.us.xda-developers.com ([2604:9a00:2010:a080::2000])
by mx.google.com with ESMTP id g21si16719496yhc.167.2013.11.12.05.45.43
for <xxxxxxxxxx>;
Tue, 12 Nov 2013 05:45:46 -0800 (PST)
Received-SPF: neutral (google.com: 2604:9a00:2010:a080::2000 is neither permitted nor denied by best guess record for domain of www@saga.php.va.us.xda-developers.com) client-ip=2604:9a00:2010:a080::2000;
Authentication-Results: mx.google.com;
spf=neutral (google.com: 2604:9a00:2010:a080::2000 is neither permitted nor denied by best guess record for domain of www@saga.php.va.us.xda-developers.com) smtp.mail=www@saga.php.va.us.xda-developers.com
Received: by saga.php.va.us.xda-developers.com (Postfix, from userid 500)
id 7F40333A0C44; Tue, 12 Nov 2013 08:45:43 -0500 (EST)
To: xxxxxxxx
Subject: Reply to thread '[FRAMEWORK ONLY!] Xposed - ROM modding without modifying APKs (2.3.1)(10.10.2013)'
From: "xda-developers" <webmaster@xda-developers.com>
Auto-Submitted: auto-generated
Message-ID: <20131112134543.b4ed465f421a@xdaforums.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-Mailer: vBulletin Mail via PHP
Date: Tue, 12 Nov 2013 08:45:43 -0500 (EST)

Two others from "fireball.php.va.us.xda-developers.com ([2604:9a00:2010:a080::1400])" were also blocked.

And an older one:

Return-Path: <www@xda-developers.com>
Received: from titan.xda-developers.com (titan.xda-developers.com. [50.23.193.228])
by mx.google.com with ESMTP id h3si9561991oej.0.2013.11.10.15.13.19
for <xxxxxxxx>;
Sun, 10 Nov 2013 15:13:19 -0800 (PST)
Received-SPF: pass (google.com: domain of www@xda-developers.com designates 50.23.193.228 as permitted sender) client-ip=50.23.193.228;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of www@xda-developers.com designates 50.23.193.228 as permitted sender) smtp.mail=www@xda-developers.com
Received: by titan.xda-developers.com (Postfix, from userid 501)
id 2BE9F15605BC; Sun, 10 Nov 2013 17:13:19 -0600 (CST)

Note that this one actually looks at the SPF records of xda-developers.com, whereas the others look at some.sub.domain.xda-developers.com, find no SPF entries and therefore use the best guess. For "doubleshot", that's fine because 207.244.72.15 is the IP of doubleshot.php.va.us.xda-developers.com, which is the domain in "smtp.mail" (and it's also in the same subnet as the A-record of xdaforums.com if that matters, which I don't think it does). But the other two use an IPv6 outgoing address, whereas no AAAA record is published in the DNS for this domain.