Aslo, after an email is delivered to your client (Outlook), you may delete that email in the webmail box, and it will still stay in the Outlook. It means that any changes you make to your email account in the email client will not affect the webmail inbox. With POP protocol your email client account and email server are not synced.

The main difference is that IMAP protocol always syncs with email server so that any changes you make in your email client (Microsoft Outlook) will instantly appear on your webmail inbox. There are two different email protocols - IMAP (Internet Message Access Protocol) and POP (Post Office Protocol). When you send an email from Outlook it will give you an option to select which account you are sending your email from: You will have multiple Inboxes visible in the left pane, and each incoming email will end up in the corresponding Inbox. You can have multilple accounts setup in MS Outlook and all your e-mails will come to a single Outlook application. I like to use Microsoft Outlook on my personal desktop for my business and personal e-mails.

Add gmail to microsoft outlook