root@kali:~# apt-get install bsd-mailx root@kali:~# apt install ssmtp root@kali:~# leafpad /etc/ssmtp/ssmtp.conf PASTE BELOW TEXT AT /etc/ssmtp/ssmtp.conf # # Config file for sSMTP sendmail # # The person who gets all mail for userids < 1000 # Make this empty to disable rewriting. root=YOUR EMAIL ID # The place where the mail goes. The actual machine name is required no # MX records are consulted. Commonly mailhosts are named mail.domain.com mailhub=smtp.gmail.com:587 AuthUser=YOUR EMAIL ID AuthPass=password UseTLS=YES UseSTARTTLS=YES # Where will the mail seem to come from? #rewriteDomain=gmail.com # The full hostname hostname=kali # Are users allowed to set their own From: address? #YES - Allow the user to specify their own From: address # NO - Use the system generated From: address FromLineOverride=NO Debug=YES root@kali:~# mail -s "asssssssss" adityashrest.shrest34@gmail.com < asd