spamd greylisting

[Brian Camp <sevenn@nezzwerk.net>]

For two days, I've been running spamd with the new greylisting feature 
in front of two mail servers with a total of around 600 users.  I found 
that mail from yahoo groups would not pass through because of the way 
that yahoo groups sends mail (long delay, and sometimes a different IP 
does second attempt), so I whitelisted them with a no rdr rule.  Has 
anyone had any similar experiences with different sites?  If so would 
you mind sharing your work around for those sites?  Maybe I can fix 
something before a customer complains... :-)

Thanks in advance.

-Brian