So my ex girlfriend and I work at the same public organisation. I no longer wish to speak to her and have blocked her on all personal social media etc.
However, she can email me at work. Naturally I can't block someone in the same organisation, but I have no wish to talk to her unless it is work related - and our jobs have no overlap: to the extent I would be truly astonished to find that I had to email her at any point in the next 5 years.
Equally I don't wish to be unprofessional, rude, or leave myself open to a complain or any suggestion of bullying, which makes it a little delicate... On social media I could block her or state simply that I don't wish to talk to her, but in the work place I'm not sure that's acceptable, or at least desirable, conversation.
So considering that her emails are polite, but unwanted, chit chat, that I can't block or hide her emails, and that I wish to remain entirely professional in the work place, what would be the most acceptable way to avoid having to interact (socially) with a colleague I have no desire to interact with?