error A connection attempt failed because the connected party did not properly respond after a period of time... on receiving email with imap

hi my friends

good timing

in receive email from some providers , i get this error:

on code:

using (ImapClient ic = new ImapClient(ImapServer, Username, Password, ImapClient.AuthMethods.Login, ImapPort, EnableSsl))

i get this error:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

how can i solve this?

please help me.

I have little time