Skip to main content
We are aware of an issue after updating to cPanel versions 11.110.0.65, 11.126.0.21, or 11.128.0.11, some cPanel plugins or features are no longer functioning properly including WP Toolkit. Please see the following article for more information and updates:
Update to latest cPanel 110, 126, or 128 versions removes "addonfeatures" directory.

* 1.4 DOS_OUTLOOK_TO_MX Delivered direct to MX with Outlook headers

mikefromnz
Hey guys, I am running a small shared hosting server and I redirect all my emails to a smart host provider (smtp2go) I have noticed that if my customer uses Outlook as their mail client, and sends an email to another host using SpamAssassin, it triggers the following rule * 1.4 DOS_OUTLOOK_TO_MX Delivered direct to MX with Outlook headers This is a bit of a pain, and looks to be caused because the "recieved: from" headers are only showing the SMTP2GO server, not mine or the customers local machine, whereas this rule states if it had some more headers it would not trigger. Any ideas?

Comments

3 comments

Date Votes
  • cPanelMichael
    This is a bit of a pain, and looks to be caused because the "recieved: from" headers are only showing the SMTP2GO server, not mine or the customers local machine, whereas this rule states if it had some more headers it would not trigger.

    Hello, Is the "Enable Sender Rewriting Scheme (SRS) Support" option enabled in "WHM >> Service Configuration >> Exim Configuration Manager >> Basic Editor" on this system? This option rewrites sender addresses so that the email appears to come from the forwarding mail server. This allows forwarded email to pass an SPF check on the receiving server. Thank you.
    0
  • mikefromnz
    Yes it is, although I don't think this would be the cause of the issue? What I mean is the email headers usually include Received: from mail.whatever.com (mail.whatever.com. [192.someipaddy]) by mx.someone.com with ESMTPS id blah for
    And if it was sent from their home/office computer using Microsoft Outlook, you usually see more than one "received from" header as it goes through each server. With my Exim using a 3rd party smart host, I am not seeing even my own server under the "received from" just simply the 3rd party smart host's server (smtp2go) and also not seeing the customers own machine The problem this creates is it triggers the DOS_OUTLOOK_TO_MX SpamAssassin rule which is due to having the header below come very shortly after the "received from" with no other servers in list, with the logic that it must have been sent direct from a mail server using Outlook (client software), in which case that'd be a bit dodgy! X-Mailer: Microsoft Outlook 15.0
    0
  • cPanelMichael
    With my Exim using a 3rd party smart host, I am not seeing even my own server under the "received from" just simply the 3rd party smart host's server (smtp2go) and also not seeing the customers own machine

    Hello, I recommend reporting this to the support team for the email service you are using (SMTP2GO) to see if there are any settings to enable to allow this data to pass through. Thank you.
    0

Please sign in to leave a comment.

Didn't find what you were looking for?

New post