Does spamassassin use relays.osirusoft.com?
I have a lot of DNS traffic running with this query and I noticed that my
mail log was full of messages to stop using relays.osirusoft.com.
I turn off the use of relays.osirusoft.com which has greatly sped up my email
and even cleaned up the network traffic a bit.
But I still have a lot of these running around. I suspect it's spamassassin,
but I'm not really sure how to even begin investigating without going through
a lot of code.
Long computations which yield zero are probably all for naught.