If you use Outlook 2016 (or another client that support STARTTLS) use STARTTLS and port 25, otherwise use port 587 and TLS encryption. The Outgoing server supports a couple of options. This will automatically change the port to 995 for POP3 or port 993 for IMAP. In More Settings, Advanced tab, set the Incoming server to use SSL encryption. See Gmail in Outlook: unable to connect to email for more details. If you don't use two-factor authorization on your Gmail account, you need to Allow less secure apps in Gmail settings at the end of the Gmail Security options page. See ' Using Outlook with 2-step verification' for more information. If you enabled two-factor verification on your Gmail account, you need to use an app password in Outlook. Use your full Gmail address, including or as the username. To configure Gmail accounts for POP3, use If you don't want to use IMAP you'll need to configure the account manually. If you let Outlook configure your Gmail account, it will set it up as IMAP. Outlook Categories map to Google Groups One user-license is valid on up to 3 PCs. Set the Auto Sync feature for every 15 minutes or manually sync on your own. Sync Outlook to Google Calendar, Contacts, Tasks! Two-way sync is enabled by default, or choose one way sync.
