Try later ... after 24 hours ????
---------- Forwarded message ----------
Date: Fri, 21 Dec 2007 17:23:01 +0100
From: Mail Delivery System <Mailer-Daemon@???>
To: leo@???
Subject: Warning: message 1J5JXM-00004y-74 delayed 24 hours
This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 24 hours on the queue on vettore.dicea.unifi.it.
The message identifier is: 1J5JXM-00004y-74
The date of the message is: Thu, 20 Dec 2007 12:35:22 +0100 (CET)
The subject of the message is: Re: [exim] secondary MX: allow only a set of users
The address to which the message has not yet been delivered is:
exim-users@???
Delay reason: SMTP error from remote mailer after RCPT TO:<exim-users@???>:
host mx.spodhuis.org [193.202.115.177]: 451-81.119.23.246 is not yet authorised to deliver mail from
451 <leo@???> to <exim-users@???>. Please try later.
No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.