mailing from raspberry pi raspian buster gmail

How to send email via gmail raspian buster

sudo apt-get install msmtp msmtp-mta mailutils

following

https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=244147#p1496767

and/or

https://doc.ubuntu-fr.org/msmtp

https://doc.ubuntu-fr.org/tutoriel/comment_envoyer_un_mail_par_smtp_en_ligne_de_commande