So I have a question in regards to the delivery log and this is more for my knowledge than anything. I don't mean to sound dumb and I have searched around for awhile on this, at this point it's bothering me that I can't find an answer. This is in regards to [_SPAMASSASSIN: X:X] meaning. I figured out that the first number is the result code sent from my external spamassassin installation, but what does the 2nd number signify? For example: [_SPAMASSASSIN: 16:55], I see in the spamd log the "16" is the result code, but in this context what does the 55 mean? I have also seen negative numbers in there like this for example: [_SPAMASSASSIN: -4:-15].

I greatly appreciate any insight.

Thank you.