Loren BrichterDoes iCloud Mail basically have spam filtering at all?
Jay@loren Yikes. I think the "X-Icl-Score" header is the spam score. What value do these have? 4.x seems to be the threshold in my experience.
Colin Devroe@loren It does filter spam for me. And does a fair job. However, it does get a few false positives. I've been moving them to my Inbox hoping it ālearns" but I don't know if that is how I should do that.
Jan Lehnardt 
Joni Korpi@loren For me it definitely does, and has about a 30% false positive rate. Additionally some emails are filtered out so hard they never even arrive in the Junk folder: Steam ID emails get lost about half the time. Regretting switching over from Fastmail. :|
Brian Hough@loren It puts practically *everything* in spam for me. Basically the first time someone emails me, until I tell its not, it just defaults to āthatās spamā here.
I actually donāt mind it.
Austin@loren I feel like they apply a noise filter to randomly determine what is or is not spam
Brian@loren I donāt use it enough to know for sure but itās looking like Googleās went to hell in a hand basket
Andrew Theken@loren as someone that worked on the sending end (no spam, I swear), yes, it does.
But gmailās filtering has always been better in IMO, so it can feel like a huge step back.
Though, I feel you.
@atheken haha. am I pissing into the wind if I try to "train" it by sending stuff to Junk? Or will that work eventually? (Do you know if the training happens client or server side?)
@loren my memory is a bit fuzzy, but I think itās serverside. If I recall correctly, they use a system called Proofpoint, but that might be wrong. I will poke around and look at headers later and see if thereās anything interesting in there.
@loren I didn't go too deep on this, but yeah, Proofpoint does do some stuff, and then there's some X-ICL-* and X-CLX-* headers, which might be iCloud-specific scoring. Marking stuff does do *something*, but it just might not be as good as gmail's filtering.
```
X-Apple-MoveToFolder: INBOX
X-Apple-Action: MOVE_TO_FOLDER/INBOX
X-ICL-SCORE: 3.333033030041
X-ICL-INFO: <base64 encoded string..>
X-CLX-Shades: Deliver
X-Proofpoint-GUID: 2H1OC-tDwADexVIzkbnV7qo0zDLpsR6J
```
@atheken interesting, thanks!