February 6, 2015
Apple iPhone iPad Mac error – This message could not be moved to trash
This error can occur when using IMAP on an iDevice.
The error occurs due to the TRASH folder being unavailable or unknown to the email client.
You can fix this by following these steps:
Go into Settings > Mail, Contacts, Calendars.
Then select the email account in question, select Account
Then Advanced, Deleted Mailbox, and under On The Server tap the ‘Trash’ folder
Then exit out.
This should then allow you to delete the email