[Serial-pci-info] Delivery problems with your mail

[The P. O. <postmaster>]

A copy of your message is being returned to you due to difficulties
encountered while attempting to deliver your mail.

Very often people attempt to send mail to USERIDs, which are not
known to this particular system.

The following errors occurred during message delivery processing:

<vmail elecard.com in...@el... 99>: Forwarding loop detected