Can’t remove message from email inbox of i phone 5.

I am using my company email box (IMAP account) at iphone 5 & when I deleted unwanted email from my inbox, its can’t be moved to Trash mailbox. Display message “Unable to Move Messages-----The messages could not be moved to the mailbox Trash.”

Sometime its looks removed from inbox but when I checked “Trash” there are no removed messages. Again when I checked for new messages, the deleted old messages again returned to inbox. Same thing is happened at Spam box.

Also when I sent messages, its not stored at Sent box.