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Postings by Enrico Morelli

Helo command rejected: Host not found

I'm trying to configure my outlook account to send email through my
mail server, but I receive the following error:

InvalidRecipientsException: Invalid recipients were provided for the
message: ' ... at cerm dot unifi.it' (450 4.7.1
<HE1PR1001MB1369.EURPRD10.PROD.OUTLOOK.COM>: Helo command rejected:
Host not found

Is there a way to put *outlook.com in a "white list"?