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.
This sounds like the application is sending the same message two different times to the two different recipients instead of sending the message once and letting us deliver it to the two recipients.
Can you please tell us more about the app or device sending the emails?
I think that function is necessary. Please update.