{
"mail_id": "MAIL_ID"
}curl --location --request POST 'https://qyapi.weixin.qq.com/cgi-bin/exmail/app/read_mail' \
--header 'Content-Type: application/json' \
--data-raw '{
"mail_id": "MAIL_ID"
}'{
"errcode": 0,
"errmsg": "ok",
"mail_data": "MAIL_DATA"
}