When your IMAP/SMTP inbox becomes disconnected, you can reconnect it by re-entering your email server settings and validating the connection.
How to Reconnect Your Gmail Inbox
Go to Settings > Email Accounts and locate the inbox showing Not connected or Invalid connection.
Under Connect new inbox, select IMAP/SMTP and click Configure.
Enter your email credentials and server details:
Click Test connection to verify your server details.
Once the test is successful, click Connect to complete the reconnection.
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