the prepatch part 2 broke Bulkmail again the earlier fixes no longer work

I'm not a project developer and lack the skills of it; I'm more of a "hack it back into working and wait for better men to fix it right" kind of guy. That being said ...

Assuming you are getting this...
1x BulkMail2/BulkMail.lua:551: Usage: GetItemClassInfo(itemClassID) [string "=[C]"]: in function `GetItemClassInfo' [string "@BulkMail2/BulkMail.lua"]:551: in function <BulkMail2/BulkMail.lua:507> [string "=[C]"]: ? [string "@BagSync/libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:66: in function <...ceBagSync/libs/AceAddon-3.0/AceAddon-3.0.lua:61> [string "@BagSync/libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:494: in function `InitializeAddon' [string "@BagSync/libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:619: in function <...ceBagSync/libs/AceAddon-3.0/AceAddon-3.0.lua:611>

Comment out lines 551 to 561 and paste this after it

if GetItemClassInfo(17) then
    obsoletes = newHash(
            5, true,  -- reagent
            6, true,  -- projectile
            11, true,  -- quiver
            12, true,  -- quest item
            13, true,  -- key
            10, true,  -- Money
            14,  true -- Permanent
  )

It'll hobble along until "better men" get to it

There are also three function calls
GetContainerItemInfo
GetContainerItemLink
GetContainerNumSlots

These appear about 40 times throughout the code and each one will need to have C_Container. added to the start of them such that they appear as
C_Container.GetContainerItemInfo
C_Container.GetContainerItemLink
C_Container.GetContainerNumSlots

It really is getting hacky enough that you should probably just live without it until the author publishes an update.

I'm working on fixing it for 10.0. there's quite a bit of changes.

Should be fixed now.