Send test e-mail message: The server responded: 450 4.7.1 Client host rej

[1finehost]

Hello,

I am new to cwp7PRO, I have setup the server myself but can't send out emails with the following error message,

Send test e-mail message:   The server responded: 450 4.7.1 Client host rej

Could someone please assist me asap on this issue?

Thanks.

[1finehost]

Hey Guys,

I confirm that that rDNS or PTR is set correct.

Thanks.

[Netino]

Put your *complete* error message, please.