All right, I am seething and wondering if I am being unreasonable. Deliberately vague about the details because I don't want anyone catching on it involves them.
I left my old job at the start of September. Just before leaving, I finished up a big project. I wasn't the project leader but in practice did all the work, while the nominal project leader sat back and focused on other things (and enjoyed a long summer holiday abroad). Yes, there is some resentment, but that is how it goes sometimes, and I learned a lot from the experience. Anyway, I made sure the admin was all up to date, and everything was filed correctly, and started at a new company in October. Due to staff shortages and management just basically ignoring the issue, there was no immediate replacement for me despite me giving six months' notice, but they have found someone now who can start in January.
Now a client apparently sent several emails over the past couple of months complaining about an element of the project. I never got these emails, because I no longer have access to my company email (obviously). Anyway, I got a call from the project leader on Monday and he asked if I could deal with this because it had been my project and I had caused the problem. I already thought that was a bit cheeky since I no longer work there, but okay. I pointed him in the right direction, and showed him the issue had already been dealt with and the client's complaint was unfounded (or at least, not due to a mistake on my part). I also suggested what he could write to the client, and gave him my private email so that they could reach me in case my future replacement had any queries he could not answer.
Anyway, turns out, instead of getting back to the client and dealing with the complaint, he forwarded my private email and phone number to the client, who has been stalking me ever since. AIBU that this was a huge breach of privacy and just a CF move all around?