Block spam from my email address

[adamroof]

Is there a configuration in exch 2003 to reject email from outside that is pretending to be me from the inside?

eSafe i had used previously had this option, but we no longer use that gateway. We use Trend Micro SBS Worry Free. Is there an Exchange option, or anything else i can do that you might know of in Trend?

 

[adamroof]

thread955-1272185

covered this 2 years ago, but was no overall solution aside from 3rd parties. Is that still the case?

 

[adamroof]

Can you tell me if you forsee a problem with me using the following?

1. Message Delivery - Sender Filtering
"Block messages that claim to be from the following senders."
- added *@mydomain.com
- ticked "Filter with blank sender"
- ticked "Drop connection if matches filter"
2. Applied the Sender Filtering to our SMTP virtual server.

I tested a couple internal emails and is ok, tested outside in, its ok, now just need to spoof myself externally to see if it blocks.

 

[Zelandakh]

Use SenderID filtering once you have set up the relevant record for your own domain. Choose to reject failures.

 

[Zelandakh]

For more information, look up "Sender Policy Framework".