[Exim] not getting to verizon

Afternoon All,

Just wondering if anyone's got a fix for this....we upgraded
from 4.24 to 4.30 and suddenly couldn't send/receive to
verizon dsl customre. No change to our configuration

450 Requested mail action not taken-Try
later:sc011pub.verizon.net

Thanks,
James
--
James Genus Jr.
207-633-9600
jgenus@???