Your mail server doesn’t like the address. You need to figure out how to allow the user that is sending mail be allowed to use that address. It may be that it doesn’t like the + addressing? But I suspect it’s that it’s denying forumreply.
Your mail server doesn’t like the address. You need to figure out how to allow the user that is sending mail be allowed to use that address. It may be that it doesn’t like the + addressing? But I suspect it’s that it’s denying forumreply.