Class 3 Levers In class 2 levers, the fulcrum lies at one end, the effort is applied at the other end, and the load is placed at the middle. The closer the load is to the fulcrum, the lesser amount of force needed to lift it.
If youâre using Office 365 for business or other Microsoft Exchange-based email, you can find your Post Office Protocol 3 (POP3) and Internet Message Access Protocol 4 (IMAP4) server settings by using Outlook Web App.
25 is SMTP. 110 is POP3. If they are pop/smtp connecting then that is what you need to open. Web is 80/443 so if they are using active sync they need 443 open. MAPI uses 135 so if they want Outlook to function just like on the LAN with a MAPI connection you will have to open that one.