My ex keeps harassing my mum too.
My mum is a tough person and doesn’t seem to care a dot. But if she did, I am sure she would take it further with police etc.
It would be up to your mum. It is up to her to block him. Many of the harassments involve ordering me to do stuff, which upsets me- but the police say I can’t get a harassment order as the emails aren’t to me directly but to my mum, but say I could go back to court if I want to take it further. They say my mum could claim harassment. Your mum could inform the police with email evidence. Is your mum frightened of what will happen if she does take action? I hope she will get to the point soon where she realises something needs to be done X