1. Enable IMAP/SMTP service
1.1 In the upper right corner, click on [Settings] - [Account] - [Account and Security] - [Security Settings] - [POP3/IMAP/SMTP/Exchange/CardDAV services (enabled)] - click [Start the Service].
1.2. Send a text message according to the pop-up window instructions (the content is not fixed), and click [I have sent] after sending.
2. Get the Authorization Code
A pop-up window will generate an authorization verification code (i.e., the content in the red box, return to SaleSmartly and fill in the corresponding authorization code).
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