[Exim] ALRM

Can anyone suggest what might be happening here:

2002-07-23 16:18:40 19fJvZ-0007io-CC == ******.******@**.*********.com
R=dnslookup T=remote_smtp defer (-1): smtp transport process returned
non-zero status 0x000e: terminated by signal 14
2002-07-23 16:18:40 19fJvZ-0007io-CC Frozen

The item is a defered delivery (the MX is down).

This is happening in a queue run, and even though is not common, has
happened several times now.