I'm using FetchSingle(EmailID,0) and it take about 3-5 seconds, based on email size. Is it normal?
If yes, is there any faster way to fetch single mail?
There are many thousands of Chilkat user using Chilkat IMAP. There are no known issues with performance. A slow network, a very large email, or a multitude of other factors could certainly cause performance issues with any software communicating via any protocol over a network.