Emails in Trash Folder Being Automatically Deleted

[HickDead]

I have an iPhone SE and an iPad Mini 4 and I've noticed recently that the stock iOS email app has been deleting my Yahoo account emails from the Trash bin automatically every couple of days.

In the mail settings I already have marked to NEVER delete emails in the trash (on both devices) but it's still a no-go.

Has anyone heard of this issue before?

 

[C DM]

What about any settings related to that on Yahoo! Mail side of things (in the settings on their website)?

 

[BrianBaughn]

Yahoo deletes trash items after 30 days and I don't think it can be changed. Are you accessing the Yahoo account on any other devices/computers?

 

[HickDead]

What about any settings related to that on Yahoo! Mail side of things (in the settings on their website)?

Already checked. No such option exists in Yahoo Mail settings.
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Yahoo deletes trash items after 30 days and I don't think it can be changed. Are you accessing the Yahoo account on any other devices/computers?

Yes. iPad, iPhone and Desktop PC. Weird thing is when I first go to the Trash folder in my iPhone - I see all of my deleted emails for a second or two before then disappearing.

I'm using iOS 10 Beta on my iPhone. I wonder if it might be a bug/glitch causing this problem. Checked online and couldn't really find any soultion. Strange.

 

[BrianBaughn]

If the Desktop PC's email client isn't doing it (via some rule or setting) then signs would point to the beta.