troubleshooting Question

Exchange 2007 Queue full with fake domains

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Fernando Marambio asked on
16 Comments4 Solutions290 ViewsLast Modified:
We have a SBS 2008 with Exchange 2007 SP3 Build 08.03.0444.000

The message queue is full of fake domains
We are not being black listed but ISP like bigpond are rejecting our emails because or senders score rate is below 20

We are using our own public IP address to send out emails as our ISP doesnt have a smtp relay
i have created a Dmarc record
Im not sure if i need a spf records as well

When we send emails to these domain names first we get a delayed bounce back after some time and then we get a failed email later after that

we use Trend Micro Worry Free Advance as a spam filter on the server
i have contacted the support department and they said the software only filters incoming emails not out going

I'm not sure on how to stop these fake domains coming into the queue
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