"From" Startup Parameter

Is there a way to code a “From” Startup Parameter?..

It would be similar to this “To” Startup Parameter if possible…

/mailurl RECIPIENT

Use this parameter to create a new message with a pre-defined email address compliant with RFC 6068. Example: MailClient.exe /mailurl “mailto:[email protected]?subject=hello&body=bodytext”.

Any help?

Yes, /mailurl RECIPIENT can be used.

Please look at this page in the Documentation (F1).