Recently Microsoft started to block emails from my server reporting the IP as spam. Today I received an email that looks like it was sent from one of my email addresses (actually, I only have this as an alias, not an actual user/email). Could this be connected?
I have an SPF record for the domain
v=spf1 a mx a:mysite.com ip4:176.69.270.99 ~all
Here are the headers from the email, the IP address is NOT mine (it’s in Cambodia) everything else looks genuine, from the to and from email addresses to the host.
to: email@example.com Content-Type: multipart/mixed; boundary="----=_NextPart_000_00C1_01CED587.4872D6F0" Mime-Version: 1.0 Content-Language: en-gb X-Mailer: Microsoft Outlook 14.0 Return-Path: Thread-Index: Ac7Vhy3olvC1HwEAQqKw3y4wiFA/bA== X-Original-To: firstname.lastname@example.org Received: from [126.96.36.199] (unknown [188.8.131.52]) by host.myhostdomain.net (Postfix) with ESMTP id 034A41C80051 for ; Thu, 27 Aug 2015 09:39:15 +0100 (BST) Delivered-To: email@example.com Message-Id:
Any idea what’s going on? What is the best way to check that my email server is ‘secure’?