Set the library to deprecated.
The new Email Client is available here https://github.com/mobizt/ESP-Mail-Client

Add support ESMTP command.

Remove the WiFi reconnection and its status checking.

Fix the size of SMTP sending attachment data limit issue.

Fix the truncated HTML message body bugs.

Fix corrupt heap (array index out of bounds).

Fix untrapped IMAP response for invalid search criteria that causes loop forever.

Fix base64 chunk data encoding.

Add support to set, add and remove flags.