Unable to reply and/or attach to emails

Hi Ian,

This isn't the experience we want you to have. We've replied to your original post.
Please check & revert to us via it to keep the conversation in a single thread.
Thank you for your understanding in advance!
VERY FRUSTRATING! - I repeatedly get this 'reply' to my query emails:

Dear Customer,

Unfortunately, your email wasn’t delivered because we can’t identify which ticket it refers to.

Hi Ian,

This isn't the experience we want you to have. We've replied to your original post.
Please check & revert to us via it to keep the conversation in a single thread.
Thank you for your understanding in advance!