exim: frozen messages

[michael <cs@networkingnewsletter.org.uk>]

In my exim4/mainlog I see numerous errors/warnings such as

2007-06-21 06:27:32 1I1FCe-0001RW-30 <= root@ratty U=root P=local S=1000
2007-06-21 06:27:32 1I1FCe-0001RW-30 ** mbane@ratty <root@ratty>:
Unrouteable address
2007-06-21 06:27:32 1I1FCe-0001Rd-85 <= <> R=1I1FCe-0001RW-30
U=Debian-exim P=local S=1803
2007-06-21 06:27:32 1I1FCe-0001Rd-85 ** mbane@ratty <root@ratty>:
Unrouteable address
2007-06-21 06:27:32 1I1FCe-0001Rd-85 Frozen (delivery error message)
2007-06-21 06:27:32 1I1FCe-0001RW-30 Completed
2007-06-21 06:43:02 Start queue run: pid=6489
2007-06-21 06:43:02 1I17LO-0002jr-NL Message is frozen
2007-06-21 06:43:02 1I0WFY-0002Ys-G7 Unfrozen by errmsg timer
2007-06-21 06:43:02 1I0WFY-0002Ys-G7 ** mbane@ratty <root@ratty>:
Unrouteable address
2007-06-21 06:43:02 1I0WFY-0002Ys-G7 mbane@ratty <root@ratty>: error
ignored
2007-06-21 06:43:02 1I0WFY-0002Ys-G7 Completed
2007-06-21 06:43:02 1I1FCe-0001Rd-85 Message is frozen
2007-06-21 06:43:02 1I0krq-0002Dm-9k Message is frozen
2007-06-21 06:43:02 1I0sj6-0000xH-Rw Message is frozen
2007-06-21 06:43:02 End queue run: pid=6489

These are from the start of the log but they continue up to the current
day, albeit for different message IDs.

I've no user 'mbane' on the machine (ratty) so how can I unfreeze these
messages and work out where they're coming from?

Cheers, Michael