IMAP Not working

IMAP Not working

Hi

My email client will not connect to the IMAP server, setting attached, I have tried all imap servers - 
imap.zoho.com
imappro.zoho.com
imap.zoho.eu
imappro.zoho.eu

Error logs - 
16:57:58 gemma@petstails.co.uk [IMAP]  MailClient.Accounts.ConnectionException: 
16:57:58 ()
16:57:58    at MailClient.Protocols.Imap.ConnectionPoolEntry.Reconnect(CancellationToken cancellationToken)
16:57:58    at MailClient.Protocols.Imap.ConnectionPoolEntry.Connect(CancellationToken cancellationToken)
16:57:58    at MailClient.Protocols.Imap.ConnectionPool.AcquireConnection(Folder mailFolder, Boolean idle, Boolean forStore)
16:57:58    at MailClient.Protocols.Imap.ConnectionContext..ctor(ImapAccount account)
16:57:58    at MailClient.Protocols.Imap.Synchronizer.SynchronizeFoldersCommand.ExecuteInternal(WorkerStatus status)
16:57:58    at MailClient.Protocols.Imap.Synchronizer.ImapCommand.Execute(WorkerStatus status)
16:57:58    at MailClient.Commands.Command.Process(WorkerStatus status)


SMTP is working and so is POP3