For users in China, 163 Mail is recommended — easy to configure. Gmail is often blocked in China. The steps are the same for all email providers; the only difference is how you obtain the app-specific password at the end.
Step 1: Register your 163 Mail account (skip if you already have one)
Step 2: Log in and click "Settings"

Step 3: Open POP3/SMTP/IMAP settings

Step 4: Enable IMAP/SMTP service — an authorization code (equivalent to an app-specific password) will be generated. Copy and save it.

Step 1: Find the skill in ClawhHub

Step 2: Install the skill



