Over at Apple iphone forums there are a lot of people with the issue of being unable to delete emails on an iphone in an imap account. When trying to delete mail a message may pop up “unable to move to deleted items” or similar. The emails may appear to be deleted but will reappear the next time you open the email client on the iphone.
The problem is related to the iphone deleting the emails locally, on the iphone and not on the server. If the server receives no instructions to delete email it will re-populate in the client.
If you go to the mail settings on the iphone you may not see imap folders other than the standard inbox, and this could be why the default settings to delete from the server are not working.
If you have this specific problem, and bearing in mind there are no standardised settings for uniform imap across all providers, try this:
go to settings >mail >account >advanced
if you see you only have deleted locally (on my iphone) available try turning off SSL and remove any prefix for the IMAP Path Prefix setting.
Not all mail providers and ISP’s have IMAP mail SSL in place at this time, and not all (smaller) ISP’s have IMAP services available.
If you are located in Perth WA and in small business, tradesperson, professional and would like a reliable way to sync mail via imap, calendar and contacts between office desktop and mobile devices such as laptop and iphone, we charge a standard 1 hour support charge to set up and configure this for you.