Logout/Close the connections once we're done

examples/gmail.hs

@@ -25,11 +25,13 @@ imapTest = do
     let firstMsg = head msgs
     msgContent <- fetch c firstMsg
     B.putStrLn msgContent
+    logout c
 
 smtpTest = do
     c <- connectSMTPSTARTTLS "smtp.gmail.com"
     sendCommand c $ AUTH PLAIN username password
     sendMail username [recipient] mailContent c
+    closeSMTP c
   where mailContent = subject `B.append` body
         subject = "Subject: Test message\r\n\r\n"
         body = "This is a test message"