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This must be first initialized with the function SMTPc_SetMsg(). You will need also to create several instance of SMTPc_MBOX to populate your SMTPc_MSG. SMTPc_MBOX is a mailbox that define the adresse adress and the name if of a sender (FROM) or a recipient( TO,CC and BCC). SMTPc_SetMbox() is a tool to populate the field of the mailbox.
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