[EXIM] relay blocking

I have just had

1999-06-21 17:12:23 refused relay (host_accept_relay) to
<######@ing.uc3m.es> from <#######@dmu.ac.uk> H=(dmu.ac.uk)
[146.227.22.148]
in my mainlog, but my config file says:

host_accept_relay = localhost:127.0.0.1:*.eng.dmu.ac.uk:*.eng.cse.dmu.ac.uk:146.227.22.0/24:dmu.ac.uk

relay_domains =*.dmu.ac.uk:dmu.ac.uk:*.eng.dmu.ac.uk:eng.dmu.ac.uk:*.eng.cse.dmu.ac.uk:eng.cse.dmu.ac.uk:146.227.22.0/24:

so this *should* account for stuff trying to get out from 146.227.22.*
and specifically from user@???

Can someone tell me what I have missed?
    Thank you,
    Hugh
    hgs@???

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