Add message for which Message Recall cannot be performed

The following points can be confirmed about Message Recall and DB Quota.

1.
To recall message that has already been sent, click the "Recall Message" button on the Sent view.
However, if the DB quota is exceeded, "Recall Message" button cannot be clicked because the sent mail will not remain in the Sent view.

2.
If the DB Quota is exceeded, a message will appear saying that the mail size is exceeded when trying to send a new mail.
So, if the new mail is sent as it is, the sent mail cannot be saved in the "Sent" view.


If it is the above operation specification, please add the point that Message Recall cannot be executed to the message displayed in 2.