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macrumors regular
Original poster
Dec 15, 2011
For the past 3-4 months or so, too many incoming emails arriving on my Mac are ending up in the Junk folder, not even marked as junk. Typically those from companies I trust. Any idea why the new zealousness? And I see no way to mark them as not junk after the first instance when they were marked junk and I unmarked them. Happening since I upgraded to Yosemite. Thanks.


macrumors G4
Jul 17, 2002
OK. Somehow, it escaped you that Mail has an Artificial Intelligence-based junk mail filter. This has been the case from the beginning. However, the AI must be trained to work effectively. This is how you enter the junk mail filter into training mode:
  1. In Mail/Preferences..., click the Junk Mail tab.
  2. Check Enable junk mail filtering
  3. Select Mark as junk mail, but leave it in my Inbox.
  4. Now, the filter is ready for training. You decide which messages are junk and which are not. To start, some messages will be flagged as junk, others will not be.
  5. If a junk message is correctly identified as junk, then you may discard it by clicking the Mail Trash icon.
  6. If the junk mail filter missed a junk mail message, then you must manually flag it by clicking the Thumbs Down icon next to the Trash icon.
  7. If the junk message filter incorrectly flagged a real message, then open the message. Click [Not Junk] in the upper right hand corner.
  8. Over time, you should see most or all of your junk messages having been flagged. You should also see few if any false positives. It should take about 2 weeks for the Mail junk mail filter to learn the profile of the junk messages that you receive.
  9. If you are satisfied with the accuracy of the filter, then return to the Junk Mail tab in Mail/Preferences....
  10. Select Move it to the Junk mailbox.
Although the junk mail filter will then be out of training mode, it is still learning. Manually flag junk messages if the filter misses them. Periodically check the Junk folder for false positives. If a flagged message is a false positive, then open it and then click [Not Junk] in the upper right hand corner.
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macrumors G4
Jul 17, 2002
Well, don't I feel stupid.
There is no need to feel stupid. I have seen quite few posts asking for help with junk mail filtering in Mail. Almost all of them labor under the misimpression that junk mail is a fixed target. They tend to want a junk mail filter that is a magic bullet rather than user-trainable.


macrumors member
Mar 21, 2006
My problem is the false positives. So many of my legitimate emails go to junk. I click on "not junk" and I even add the sender to contacts for recognition and they still show up as junk. This happens with things like from where I have lots of correspondence. At this point, I am having to check my junk folder as much as my inbox. For me, this has been since Yosemite also and these false positives have happened for months. Any idea how many times I have to mark "not junk" for it to learn? I must be into the hundreds by now.
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