I had some technical email problems
I recently changed my email service provider. Overall, I am happy with the results. There was, however, one major area that I underestimated: the server-side spam policy. Their default settings are quite aggressive in rejecting messages.
I am aware of four cases where this has happened: two were GitHub notifications related to my Emacs packages and the other two were from people I frequently correspond with.
I have now revised all the relevant settings and am, hopefully, able to receive every legitimate email. If you sent me a message in the past week or so and I did not reply to it, then I most probably never got it. Please send it again.