It is working in 7.4

Well I’m not getting the email that states I have a new PM. Is this because I’m sending it to myself (I’m the sender as well as the recipient)?

yes

anyone try this in 7.5.x ?

I was trying to add this, but can't find any string remotely matching the one it says to search for...

it's part of stock 7.5.2 now

got it, thanx!

Is there a control panel setting for this? I can't find it. I haven't gotten a PM for multiple identities in almost a year, but my co-admin has. I'm running 7.5.6

My Stuff-> Preferences

last option "Notify me when someone accesses multiple accounts."

Great, thanks!

I wonder if there are any plans to include a whitelist so we don't receive notifications for known shared accounts, just new ones... *hint*