This message has not been downloaded from the server.

Have also been having this problem and at first thought it was me. Can't believe it has been going on for this long and no fix. Very inconvenient and turning me off to Apple. Disappointing.

Hi, I agree with your comment. If you read the posts above they include words like suffering, struggling etc.... have you seen anyone official from apple support to interfere or even reply? Only a few iPhone fanatics who have other kind of interests reply but with no luck. I am very disappointed with apple! I have repeatedly send them inquiries asking them to help me and solve the problem but they keep a loud silence... that easily declares that they are incompetent. Disappointing.....

Yes I quite agree with you about this, it has become a bit of a joke now, and the lack of response or help from Apple in correcting this problem is discusting to be honest, and really has now put me off of further Apple purchases. It's as if they are ignoring the problem and hoping it goes away! Well their customers will.

I have found a work-around! 😝

When removing message from TRASH, avoid using the DELETE ALL command !! Instead, delete each message individually, eg by swiping left.

Since I've been removing trashed messages one at a time, all messages Inbox and in Sent have remained downloaded.

If this works for you, please will you mark my reply a Helpful?

Rationale:

The problem always occurred - that is to say additional messages lost their content saying the Message was not downloaded from the server - after I just emptied the Trash folder.

I wondered if Apple were somehow not properly indexing or identifying which messages were to be deleted. So I tried laboriously deleting my trashed messages one a time for three months. I have had no occurrence of the problem since then.

Apple please note.