Error 550 email

I’m getting an error attempting to subscribe to a newsgroup: 550-Several RFCs state that you are required to have
a postmaster 550-mailbox for each mail domain. This host does not accept
mail 550-from domains whose servers reject the postmaster address. 550
Sender verify failed.

Any suggestions on whether there is a way around this would be appreciated.

Uh, try setting up a postmaster mailbox or alias on the same domain as the address your sending messages from?

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