How do I set up my 20i mailbox in Outlook?

Ian Ryde
Published: 19 June 2017Last updated: 14 September 2023
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Setting up your 20i mailbox in Outlook is quick and easy. We make use of 'autodiscover' technology, which means that in the majority of cases, Microsoft Outlook can set up your account for you with only an email address and a password.

Here's our walk through video on how to set up your 20i mailbox in Outlook:

Automatic Outlook Setup

  1. In Outlook, choose the File tab
  2. Under Account Information, choose Add Account
  3. On the Auto Account Setup page, enter your name, email address, and password, and then choose Next
  4. Choose Finish

Manual Outlook Setup for your mailbox

If automatic setup failed, you can choose Manual setup or additional server types to enter your settings manually. Use these settings:

  • Account type: IMAP
  • Incoming mail server: imap.stackmail.com.
  • Outgoing mail server: smtp.stackmail.com.
  • Incoming server port (IMAP): 993
  • Use the following type of encrypted connection: SSL
  • Outgoing server port (SMTP): 465
  • Use the following type of encrypted connection: SSL/TLS

When setting up your account, please choose More Settings > Outgoing Server and check the box for 'My outgoing server (SMTP) requires authentication'.

If you experience any problems with the connection or receive a certificate warning, please disable SSL/TLS encryption and change the incoming server port to 143. 

You can also set up the account using POP3, however this is not recommended in general as emails will be downloaded to the mail client you connect to the mail server.

  • Account type: POP3
  • Incoming mail server: pop3.stackmail.com.
  • Outgoing mail server: smtp.stackmail.com.
  • Incoming server port (POP3): 995
  • Use the following type of encrypted connection: SSL
  • Outgoing server port (SMTP): 465
  • Use the following type of encrypted connection: SSL/TLS