I've started to receive unusual emails, that look like they come from my own domain.
Looking at the headers seems to look like it would had I sent the email myself from a legitimate email. Apart from the send IP which is obviously not me (the IP is located in the middle east).
Here is the header:
Content-Type: multipart/mixed; boundary="----=_NextPart_000_0083_01D16275.41EF9110"
X-Mailer: Microsoft Office Outlook 11
X-Mimeole: Produced By Microsoft MimeOLE V6.1.7601.17609
X-Antivirus: avast! (VPS 160208-2, Tue, 01 Mar 2016 06:50:46 -0700), Outbound message
Received: from bzq-85-130-211-101.static.bezeqint.net (bzq-85-130-211-101.static.bezeqint.net [126.96.36.199]) by server.MY-HOSTNAME-DOMAIN.net (Postfix) with ESMTP id BA6111C800F9 for <ME@MY-DOMAIN.com>; Tue, 1 Mar 2016 14:50:17 +0000 (GMT)
Emailing: MX62EDO 01.03.2016
(188.8.131.52 is not my IP (it's in the Middle East))
I have an SPF record:
"v=spf1 a mx a:mydomain.com a:server.myhostnamedomain.net ip4:my.ip.add.ress -all"
Any idea what is going on?
Until recently I only ran FirewallD, but now I have installed CSF (config server firewall).