Comments on: 450 – Requested action not taken – The mailbox was unavailable at the remote end. A secondary SMTP error code may follow “450” to refine the reason for the failure to transmit the message, e.g. “SMTP Error 450 (also called SMTP Error 4.5.0)

Comments on: 450 – Requested action not taken – The mailbox was unavailable at the remote end. A secondary SMTP error code may follow “450” to refine the reason for the failure to transmit the message, e.g. “SMTP Error 450 (also called SMTP Error 4.5.0) http://www.indovps.com/tutorial/mail-tutorial/450-requested-action-not-taken-the-mailbox-was-unavailable-at-the-remote-end-a-secondary-smtp-error-code-may-follow-450-to-refine-the-reason-for-the-failure-to-transmit hourly 1 http://wordpress.org/?v=3.0.5