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aliceposta accounts in hard bounce


 

Checking the Bouncing members list in my group, I have noticed that several members with accounts on aliceposta.it are in hard bounce status with the same error message:
"smtp.aliceposta.it: 550 mail not accepted from blacklisted IP address [66.175.222.12]"
The IP number is always the same.

I am not sure about the cause and no member has complained about this problem so far.
Is there anything that I can do?

Thank you for your help.
Marina

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