However I'm using OL 2003. In Status Bar, left hand end, there's a count of read but not unread emails of the current highlighted folder. Right click on the Status Bar does nowt. The only count of unread emails is in brackets against the individual folders in the LH folder list. There is nowt to tell you how many emails were read in the last Send/Receive pass (which, using filters, can end up in various folders), unlike WLM & OE.
Furthermore, there is nowt to tell you how many emails were NOT read in the last Send/Receive pass cuz they were deleted from server by filters, again unlike WLM & OE (by the process of subtraction).
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC