if my hunter learns a mail item, will that also be learned on any other class that can use mail?

Short answer: Yes, any mail wearer can use almost all mail items learned.  However tier pieces can only be used by that class.

Long answer:

Tier 20 shaman normal set is Regailia of the Skybreaker.

Tier items can only be used by their class, so a hunter cannot collect the Skybreaker items directly.  However, there are a few pieces of the set that both hunters and shaman can learn and use (feet, waist, wrist) regardless of tier items.

There are also look-a-like items for almost all of the other gear slots: Regalia of the Skybreaker (Normal Lookalike)

My hunter can't learn or transmog Harness of the Skybreaker (Shaman tier chest), but she can learn and transmog Hauberk of Frozen Mist which looks exactly the same.  So a hunter can collect and transmog the appearance set minus the cloak (7/8), even though they don't have an official Blizzard "set" for it.

My shaman has 5/8 collected and she's only level 103, because my hunter has gotten lookalike pieces while raiding.  My hunter can use all 5 of those appearances too.

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I agree that we could better differentiate it and we will be moving it up on our to-do list. :)

Auctioneer users:

We just pushed version 7.3.0.04 which will automatically disable the Can I Mog It? icons in the Auction House if Auctioneer is enabled.

Can I Mog It?'s tooltips will still work and the icons in your bags and through the rest of the interface should not be affected.

If you are not using Auctioneer then you should not see any difference.

That's...less than desirable.  Something to keep in mind if we ever decided to try doing Auctioneer support directly in the frame.  (Not sure we will.)

Auctioneer also seems to be using Blizzard's default AH icon frames and resizing them small instead of creating their own frame.  So our icons were showing up on the tiny frames and completely blocking the default icons. :|

Thanks for letting me know.  I'll do some performance testing and see how it feels.  :)

That would probably explain why we hadn't heard any reports about the tiny icons for the whole month.  Honestly I had forgotten about that setting since I dropped Auctioneer at the start of Legion and probably had it turned off anyway.  We'll do a bit more fine tuning of the Auctioneer check for the next release.

We added the Can I Mog It? overlay to the Auction House.  Unfortunately it was not working with the option to disable the overlay, so if you have the Show Bag Icons option set to off, it would be still showing in the Auction House.  We are fixing this in today's release (7.3.0.03).

We don't want anything to be incorrect.  Could you please take screenshots of the incorrect items with the debug tooltip enabled (/cimi debug) and share them here for me?  Thanks!

I see you posted on Auctioneer's page as well.  Our overlay does not work with Auctioneer at this time.

If you used the code that I think you used (what you pasted is currently in the addon), then it simply broke the AH overlay.

The preferred way is to disable Show Bag Icons when you use the Auction House.  You can do that in the options menu or through the slash command /cimi overlay.

For the next update we'll add check to disable the overlay automatically if Auctioneer is enabled.  Sorry for the confusion.

Edit - The below code will automatically disable the CIMI overlay if Auctioneer is enabled:

AuctionHouse.lua

Change line 12 from

if not CIMI_CheckOverlayIconEnabled() then

to

if not CIMI_CheckOverlayIconEnabled() or IsAuctioneerLoaded() then

At the top of the file add

local auctioneerLoaded;

local function IsAuctioneerLoaded()
    if auctioneerLoaded == nil then
        auctioneerLoaded = IsAddOnLoaded("Auc-Advanced")
    end
    return auctioneerLoaded
end

 Edit 2: Version 7.3.0.04 fixes this.

Quote from SalcN >>

It's late and I'm tired AF, so I don't understand anything right now. Can you clarify a couple things for me and please do so as if I was a 7 year old kid

1: The icons in the Auction House is currently wrong if Auctioneer is enabled?

2: In a future update (not now) you'll be able to take of the Auction House overlay?

3: Will it be possible to have a working Auction House overlay WITH Auctioneer and have it looking like one of the pictures in "changes" (where it's "just" an icon in top right corner and not an icon that covers the entire item icon?

It sounds like you want to enable Verbose Text.  You can find it in the options (/cimi). 

Also I already have a fix for the next update where it will properly show "Learned from another item." for "Learned for another class and item." if Verbose Text is disabled.

Can I Mog It? has only existed for as long as Blizzard's tooltip has.  We created it to expand on what Blizzard tells you.

What we do that Blizzard's tooltip does not:

• Tell you about appearances your other characters know - across your whole account.  Blizzard only tells you about your current character.
• Tell you your progress on collecting transmog sets - both with tooltips and an overlay.
• Add overlays all over the default UI so you can tell at a glance if you know something without having to mouse over it: bags, bank, guild bank, void storage, mailbox, vendors, auction house, dungeon journal, loot roll windows, and crafting windows.