IMAP/SMTP/POP3 protocols are enabled by default in Spacemail, so you won’t need to activate them manually. There are two ways to view the configuration details:

Simply log in to webmail and check the Settings menu to find the details for configuring your preferred email application.
IMAP, SMTP, and POP3 settings are also available in Spacemail Manager. Click on your mailbox and select “IMAP/SMTP/POP3” in the mailbox side panel to view settings.

Starting from 19 February 2025, all new email accounts have the auto-discovery feature enabled for Outlook and Thunderbird. This means you no longer need to manually input server settings for these email clients — just enter your email address and password, and you're all set.