Any recommendations for a replacement for Gmail?

I've used Gmail for decades and I just verified that the forwarding is set
up to retain the forwarded message for display on Gmail. At least that's
how it always worked. But now it forwards to my ISP server wuthout showing
them to me. But not all messages. Some it still shows me. Had only one
email today and it only was forwarded.

Can't figure it out. Why did things change?

TIA


--
You know it's time to clean the refrigerator
when something closes the door from the inside.