Start by clicking SENDERS in the main menu

On the Senders's dashboard click ADD SENDERS button

This will open a wizard that will guide you forward depending on your email service provider (ESP) and connection type.

Continue the tutorial by selecting your ESP
👉 Connect Google Workspace using oAuth (Recommended)
👉 Connect Office 365/Outlook using oAuth (Recommended)
👉 Connect any SMTP/IMAP email providers
👉 Connect Gmail using App password