Why I'm not receiving submission emails?

The last 4 forms submitted in the last two days have not come through as emails. I submitted this same problem last week to which I was told everything and gone through in mail logs (which I cannot seem to find myself) however that was not true as one of them from last week never came through I had to forward it to myself manually. I have checked spam and do not have them and they have never gone to spam before.

I did some changes on your Notifier and did a test submission. Could you please check if you received this submission and let us know?

We'll wait for your response.

Thank you