Steps
Open the DingTalk desktop app > click Mail in the left sidebar > click Settings in the lower-left corner > Mail settings > Blocklist/Allowlist.
Emails sent from addresses or domains on the allowlist will not go to the spam folder. You can add up to 500 allowlist entries.
Emails sent from addresses or domains on the blocklist will go to the spam folder or be deleted directly. You can add up to 500 blocklist entries.