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Exchange server rejecting mail from the null sender address

I have an exchange sevrers 2007 setup with and edge server. All works fine but I have dnsreports.com failing my email because it does not accept mail from a null sender.

Where do you allow this or do I even bother?
 
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pflook
Asked:
pflook
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2 Solutions
 
Alan HardistyCo-OwnerCommented:
Don't bother - it's not essential.
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Alan HardistyCo-OwnerCommented:
Sorry - hold that thought - just checking.  Might have my brain a little confused.
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Alan HardistyCo-OwnerCommented:
Well it is technically a requirement of RFC 1123 that you accept blank mail senders, but as most blank mail senders are spammers - I would not lose sleep over not being able to accept blank sender addresses - thus spam!
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Alan HardistyCo-OwnerCommented:
From the Exchange Management Shell type the following:
Set-SenderFilterConfig -BlankSenderBlockingEnabled $false
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