SMTP client submission. (Sent email is stored in the Sent folder of the mailbox.)
The function recently added to save when sending mail using the smtp client submission in Sent Folder is inconvenient. Messages are saved as many as senders. For example, if there are 1 recipient and 1 CC, Two items are stored in Sent Folder.
It would be okay to save only one item as we normally do when sending mail.