Steps
Mobile
Open the DingTalk mobile app > More > Mail > tap the + icon in the lower-right corner to send an email.
Desktop
Open the DingTalk desktop app > click Mail in the left sidebar > click + Compose in the upper-left corner.
Every DingTalk user can use DingTalk Mail for free. DingTalk Mail is deeply integrated with DingTalk, making email as simple as chat.

