Exchange – Your message can’t be delivered because delivery to this address is restricted.
We had a customer getting this bounce back error occasionally. Research lead me to an Exchange distribution group restriction.
I went into the exchanged and examined the Group Distribution List. I wasn’t able to just add the email address so I left it checked with “Accept messages from” and checked “All senders”. I then unchecked “Require that all senders are authenticated.” I used the following article to help me with this call.
https://kb.intermedia.net/article/3278
My final screen looked like this.
Let us know if this helps you out….
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