Spam from my own domain!

[Ambarishrh]

I have an old google apps account (free) and recently started receiving lot of emails from my own domain with any random [email protected]!

A sample email snap below. Just wondering how can i stop this, don't want to mark anything @ambarishrh.com as spam either.

One thing i guess is any emails sent to an invalid [email protected] is forwarded to me, but wondering where this is originating from?

Message raw details, if this helps
Delivered-To: [email protected]
Received: by 10.28.98.133 with SMTP id w127csp2027836wmb;
Tue, 10 May 2016 07:25:41 -0700 (PDT)
X-Received: by 10.55.80.131 with SMTP id e125mr43996035qkb.62.1462890341467;
Tue, 10 May 2016 07:25:41 -0700 (PDT)
Return-Path: [email protected]
Received: from gmail.mxhero.com (engine-facing-node-2.mxhero.net. [54.236.184.32])
by mx.google.com with ESMTPS id z203si1593273qka.44.2016.05.10.07.25.41
for [email protected]
(version=TLS1_1 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
Tue, 10 May 2016 07:25:41 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates 54.236.184.32 as permitted sender) client-ip=54.236.184.32;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of [email protected] designates 54.236.184.32 as permitted sender) [email protected]
Received: from engine-facing-node-2.mxhero.net (localhost [127.0.0.1])
by gmail.mxhero.com (Postfix) with ESMTP id 093CB4BCDD
for [email protected]; Tue, 10 May 2016 14:25:41 +0000 (UTC)
Received: from [159.20.99.63] (unknown [159.20.99.63])
by gmail.mxhero.com (Postfix) with ESMTP
for [email protected]; Tue, 10 May 2016 14:25:40 +0000 (UTC)
Message-ID: [email protected]
From: [email protected]
To: [email protected]
Subject: Cooperarion with a large firm
Date: 19 Jun 2016 20:32:11 +0200
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="---------4000310893793740"
X-Mailer: Vvcxrkl ippdajf 4.8
x-mxHero-Origin-Ip: 159.20.99.63
X-mxHero-Original-Subject: Cooperarion with a large firm
X-mxHero-Sender: [email protected]
X-mxHero-Recipient: [email protected]
X-mxHero-Output-Service: org.mxhero.plugin.smtpconnector.service.SMTPConnectorOutputService

This is a multi-part message in MIME format.
-----------4000310893793740
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

[scottalanmiller]

Andishe Sabz Khazar ADSL IP Block in Iran

[Ambarishrh]

You mean this sender?

[scottalanmiller]

Yeah, unless that was spoofed, that's where it came from.

[Alex Sage]

Turn on SPF
https://support.google.com/a/answer/178723?hl=en

[Ambarishrh]

I have this at the moment.

Shall i add v=spf1 include:_spf.google.com ~all as well?

[momurda]

v=spf1 include:_spf.google.com aspmx.googlemail.com -all

are you sending emails from a or other mx records on your domain? If not you dont need to include them. This should work ok for you
I also like hard fails, but others dont.