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Relay email for clients

Operations

I have my Sophos UTM running at my home office. It is handeling my email at the moment, this is working fine.

No i would also like to handeling the emails from my clients before the emails reach their Exchange servers.

So i changed their MX records to my IP address.

I have created SMTP Profiles per client.

Under "Routing" i chose "DNS hostname" under Route by. I entered remote.CLIENTNAME.nl here.

I have checked the email with the Exchange Connectivity site, but i am getting error:

 
The server returned status code 550 - Mailbox unavailable. The server response was: Relay not permitted
Exception details:
Message: Mailbox unavailable. The server response was: Relay not permitted
Type: System.Net.Mail.SmtpFailedRecipientException

 

So i assume i have to enter the clients IP under "Relaying". i am right?

But which one? Upstream/Authenticated or Host-Based Relay?



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  • 0

    If I understood, you want to put UTM like a bridge for the external Exchange

    Normaly you have to put the exchange ip, in relay hosts

    But you have to configure the exchange send/receive connectors.

  • 0 in reply to Ol Deda

    I am sorry if i didn't explain it correctly.

     

    ATM i am using MCAfee SaaS as a SPAM/VIRUS filter for all my clients. So MX records towards Mcafee and in the control panel i tell mcafee which IP goes with which domain.

    MCafee pulled the plug out of this product, so i have to use something new.

     So i want to use my Sophos UTM as a SPAM/VIRUS filter for a couple domains, which are being hosted at different locations.

    For the moment let's focus on receiving the mail through Sophos. Sending is being done by the on premise exchange servers.

  • 0 in reply to Operations

    The last thing will be the problem. The servers IP wil be blacklisten in minutes if they send emails from different IP not in MX Records

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