MLeigh, I'm sorry to hear about the contact from your Mum - that's a tough one. It makes me realise I have been lucky to have a steady Mum, who has always been there for me. She has dementia now, so we are there for her, but I still feel lucky for the times we have.
The stuff from your Mum doesn't really sound like something it would be easy to constructively respond to. And as you say - perhaps the delete button is the best way. How she emails you is all about her and not about you.
Ps: I did read along with the fraught DIY session - I have been there! Glad things got sorted in the end xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus