It is the card that controls the sender of every transactional email Sprwt sends (order confirmations, password resets, subscription notices, admin alerts and so on). It has three settings - System Email - Email Address From, System Email - Name from and System Email - BCC Email Address (Separated by ;) - plus an Email Verification section with a Verify button.

Sprwt sends system emails through Amazon's email service by default, and Amazon only delivers mail from addresses it has verified. Until your address is verified the card shows Inactive and emails may be sent from Sprwt's fallback address instead of yours. The same three settings also appear in Client Config under the Business: Email tab.