Which local folder temporarily stores all outgoing emails until the email program successfully sends them to a recipient? The
stores all outgoing emails until the email program successfully sends them to a recipient.

The answer o this question is given below in the explanation section.

Explanation:

When you will create or compose an email, it will automatically get saved in the local draft folder.

Some email providers, for example, g-mail, when you will compose e-mail it gets saved in a local folder called draft and stores all outgoing emails until the progress successfully sends to the recipient.

However, it is noted that some email providers stores all outgoing email until the email program successfully sends them to the recipient in a local folder called "outbox". When an e-mail sent successfully to the recipient, then the e-mail will be shown in the sent folder.

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explanation:

answer; the above statement is (true);