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Email Protection with Exchange 2010 Server - mail not getting to exchange server

ChrisBaksa
Hello,

I am in the process of configuring UTM9 (running as a virtual appliance) to filter my incoming mail.  I have a pretty basic setup.  

  • DSL using No-IP for Dynamic DNS management and smarthost routing for sending
  • Astaro UTM 9 (latest firmware)
  • My current NAT rules forward port 25 directly to my mail server.  Also forwards 443 for owa and IMAP and POP3 ports.  I removed port 25 from this rule with now shows mail flowing into UTM's SMTP proxy.


My problem is... It never reaches my inbox.
I can see the messages in the logs.  but the inbox never gets them.
I tested sending myself a zip file (which should have been passed thru with the attachment stripped) but I got nothing.

I don't really care about filtering on send right now.  I just want to scan the incoming mail and cut down on the wealth of crap that is being missed by the exchange servers filters and use the Attachment features that UTM has.

What am I missing?


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  • 0
    Mail Protection (SMTP):

    • Global: Simple Mode
    • Routing: Add your mail domain (e.g. example.com) and put your mail server in the host list
    • AntiSPAM and AntiVirus: Make your preferred settings.
    • Relaying: Put your mail server in the allowed hosts for host based relaying.
    • Advanced: Enter your details for your ISPs smart host at the bottom of the page. Do not tick Transparent Mode!
    • Your mail server: set the UTM as smarthost.


    edit: see also: https://community.sophos.com/products/unified-threat-management/astaroorg/f/56/t/48998

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
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  • 0
    Mail Protection (SMTP):

    • Global: Simple Mode
    • Routing: Add your mail domain (e.g. example.com) and put your mail server in the host list
    • AntiSPAM and AntiVirus: Make your preferred settings.
    • Relaying: Put your mail server in the allowed hosts for host based relaying.
    • Advanced: Enter your details for your ISPs smart host at the bottom of the page. Do not tick Transparent Mode!
    • Your mail server: set the UTM as smarthost.


    edit: see also: https://community.sophos.com/products/unified-threat-management/astaroorg/f/56/t/48998

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
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