Updates specific email account settings without requiring re-authentication. Use this endpoint to modify daily limits, custom domains, signatures, and other non-credential settings.
All fields are optional - only include the fields you want to update. Omitted fields remain unchanged.
Use this endpoint to:
Adjust daily sending limits as your account reputation improves
Add or update email signatures
Configure custom tracking domains
Change BCC settings for compliance
To update SMTP/IMAP credentials or connection settings, use the Add SMTP Email Account endpoint with the account ID included to perform an update instead.