IMAP is the most sensible email setup for multiple devices, not POP.  It 
resolves the problem you are experiencing. 

See if you can reset your server to be an IMAP Account. 

Tim

Sent from Tim's iPhone

> On 13 Dec 2017, at 7:14 pm, Brian Risbey <risb...@bigpond.com> wrote:
> 
> 
> 
> Hi All
> I now have multiple devices which allow me to view my email account ( POP 
> Bigpond).
> Is the setting in preferences which deletes copy ‘immediately' going to stop 
> a copy going to each device?
> Deleting the same email on each device is tiresome.
> 
> Brian
> 
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