Manually Setting Up an Email Account in Microsoft Outlook 2016 (IMAP or POP3)

If the automatic setup of your email account in Microsoft Outlook 2016 does not work, you can set up your account manually.

Requirements

Hint: In Microsoft Outlook 2016, you can manage multiple email accounts using IMAP (Recommended) or POP3.

Step 1

Open Microsoft Outlook 2016 and click File on the menu.

Step 2

Under Account Information, click Add Account.

Step 3

Select Manual Configuration or Additional Server Types and click Next.

Step 4

Select POP or IMAP and click Next.

Step 5

Enter the user, server and logon information. Select the account type: IMAP or POP3.

To retrieve your email with POP3, select POP3 account type under Server Information. Enter pop.ionos.com as the incoming mail server. See below for the IMAP settings.

User Information  
You can choose your name.  
Email Address The full email address you want to set up in Outlook 2016.
Server Information  
Account type IMAP
Incoming mail server imap.ionos.com
Outgoing mail server smtp.ionos.com
Credentials  
Username Your email account details
Password The password that you assigned when setting up the email address in 1&1 IONOS yourself.
Logon using Secure Password Authentication (SPA) required. Since this feature is not supported by our mail servers, please do not check this box.  
Step 6

Click More Settings.

Step 7

Under Outgoing mail server, activate the Outgoing mail server (SMTP) requires authentication checkbox. Select the menu item Use the same settings as for incoming mail servers. Click on OK.

Step 8

SSL settings for IMAP:

Now switch to the Advanced tab. Select the data for the incoming and outgoing mail servers.

Server connection number    
Incoming Mail Server (IMAP) 993 SSL
Outgoing Mail Server (SMTP) 587 TLS

SSL for POP settings:

Switch to the Advanced tab. Check the box Server requires an encrypted connection (SSL). Then select the incoming and outgoing mail server.

Server connection number    
Incoming Mail server (POP3) 995 Server requires an encrypted connection (SSL)
Outgoing Mail Server (SMTP) 587 TLS
Step 9

Click Next > Finish.

You have completed setting up your email account in Microsoft Outlook.