The following message:
UA-ID: Re: Problem
Q-ID: 16/msg.15398-0
has not been delivered to the intended recipient:
[log in to unmask]
despite repeated delivery attempts over the past 24 hours.
The usual cause of this problem is that the remote system is temporarily
unavailable.
Delivery will continue to be attempted up to a total elapsed time of 168
hours, ie 7 days.
You will be informed if delivery proves to be impossible within this
time.
Please quote the Q-ID in any queries regarding this mail.