choplist: one recipient per message

Hi, I've been trying to figure out how to get smartlist (choplist) to pass 
just one recipient per message to sendmail. I've tried the obvious in 
rc.init with the following settings:

minnames        =       1       # minimum number of names per call
mindiffnames    =       1       # minimum for maxnames-minnames
maxnames        =       2       # maximum number of names per call
maxsplits       =       0       # maximum number of parts to split dist in
maxsize         =       200000  # maximal disk space to be taken up per mail
maxconcur       =       0       # maximum number of concurrent sendmail 
calls

but it just doesn't seem to work. I know choplist is using the configured 
values to call sendmail because I can see something like "choplist 1 1 2 0 
sendmail -t -odb -odq....." in the logs. There are still 3,000-5,000 (for 
instance @aol.com) recipeints per message getting lumped together. The 
reason this is a problem is because as an anti-spam precaution, mail servers 
are rejecting connections from other servers that appear to be spamming and 
then my newsletter doesn't get delivered to many people. Does have a 
solutions for getting no more than 2 recipients per message?

Thanks very much!!!

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