Hi there,
We recently changed ISPs to Aussie Broadband. Overall a better service, but we've had a few problems with the changeover.
The main one now is this - they supplied us with a NetComm NF20Mesh router, and every email that we receive to our SME server has headers that look like this:
Received: from Unknown (HELO mail-lj1-f178.google.com) (192.168.1.1)
Every single email that we receive looks similar to this. This is a problem because it thinks they are all spam. See the other headers in the email:
Authentication-Results: logicaldevelopments.com.au; auth=none; spf=softfail smtp.mailfrom=gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=none) d=gmail.com
Received: from Unknown (HELO mail-lj1-f178.google.com) (192.168.1.1)
by logicaldevelopments.com.au (qpsmtpd/0.96) with ESMTPS (ECDHE-RSA-AES256-GCM-SHA384 encrypted); Fri, 24 Feb 2023 14:34:57 +0800
X-DKIM-Authentication: domain: gmail.com, selector: 20210112, result: pass, policy: o=~, name: sender, policy_result: accept, policy: o=~, name: author, policy_result: accept, policy: , name: ADSP, policy_result: accept
Received-SPF: softfail (gmail.com ... _spf.google.com: Sender is not authorized by default to use 'pmulroney@gmail.com' in 'mfrom' identity, however domain is not currently prepared for false failures (mechanism '~all' matched)) receiver=mail.logicaldevelopments.com.au; identity=mailfrom; envelope-from="pmulroney@gmail.com"; helo=mail-lj1-f178.google.com; client-ip=192.168.1.1
Aussie Broadband say that it's our mail server. If we swap back to our rubbish iiNet Technicolour modem, the email headers start showing the correct IP addresses. They send out a loan unit and I've setup the port forwarding rules in that, and it behaves the same way.
Has anyone used the Netcomm router in their setup? Is there a magic setting in the server that I need to check, or is the ISP just "passing the buck"?
Any suggestions gratefully received!
Regards,
Paul.