This is a Delivery Status Notification (DSN).
I was unable to deliver your message to
tdb2(a)ecs.soton.ac.uk.
I said
RCPT TO:<tdb2@ecs.soton.ac.uk>
And they gave me the error;
550 5.7.1 sender <fedora-suds-list(a)redhat.com> via
etexusa.com (
etexusa.com
[65.49.16.198]) SPF result Fail; #702 (m3Y77F045380508700)