cyrdeliver dies with errorcode 75

[David Masover]

Using cyrus 1.5.19 on debian-testing.  Trying to deliver mail to Cyrus 
from exim.  cyrdeliver fails with errorcode 75, every time, no matter 
what the options, except if I specify '-l' for LMTP.  I don't think exim 
knows LMTP, so I'm not using that.  Possible causes that have been 
mentioned mostly involve full quota or bad acl's.  However, we have no 
quotas set at all, and have tried giving everyone admin on our ACL's 
with no change.  Tried from the commandline -- cyrdeliver should be 
reading from standard input, right?  Instead, it gives no error message, 
reads no text, delivers no message -- all it does is return errorcode 
75, which is said to mean "temporary error -- user is encouraged to try 
again".  I have been trying various ways for over an hour with no success.