[Mail Action] Explain email address format (#5774)
[Mail Action] Explain email address format (#5774)

* Explain email address format

Explain how to use names with the email address in the from and to parameters, as it wasn't obvious

* Update README.md

Explain how to use names with the email address in the from and to parameters, as it wasn't obvious

Signed-off-by: 1e463cd76f71b6f74aa3f6a58b448738edc28901@savignano.net (github: cubistico)

juri8/openhab,openhab/openhab,ssalonen/openhab,openhab/openhab,TheNetStriker/openhab,watou/openhab,juri8/openhab,ssalonen/openhab,watou/openhab,juri8/openhab,computergeek1507/openhab,openhab/openhab,juri8/openhab,ssalonen/openhab,juri8/openhab,ssalonen/openhab,computergeek1507/openhab,ssalonen/openhab,TheNetStriker/openhab,TheNetStriker/openhab,juri8/openhab,watou/openhab,openhab/openhab,openhab/openhab,watou/openhab,watou/openhab,computergeek1507/openhab,TheNetStriker/openhab,computergeek1507/openhab,ssalonen/openhab,TheNetStriker/openhab,watou/openhab,TheNetStriker/openhab,computergeek1507/openhab,computergeek1507/openhab,TheNetStriker/openhab,juri8/openhab,watou/openhab,openhab/openhab