Command line mail with Gmail as SMTP and crontab

tested in OS 10.9.5 


Configure Postfix for Gmail SMTP
Edit file /etc/postfix/main.cf

sudo vim /etc/postfix/main.cf
and add in the following below the commented out relayhosts :-

relayhost = [smtp.gmail.com]:587
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_use_tls = yes
Generate sasl_password if not already exists

sudo vim /etc/postfix/sasl_passwd
and enter in the following:-

[smtp.gmail.com]:587 username@gmail.com:password
Run the following commands

sudo chmod 600 /etc/postfix/sasl_passwd
sudo postmap /etc/postfix/sasl_passwd
sudo launchctl stop org.postfix.master
sudo launchctl start org.postfix.master


Now, test the email

ls | mail -s "contents" your@yourdomain.com

(source: http://www.anujgakhar.com/2011/12/09/using-macosx-lion-command-line-mail-with-gmail-as-smtp/) 

Include the following line in crontab after running "crontab -e". In the following example, we run it twice a day

03 7,19 * * * /Users/julian/src/logs/script.sh >> /Users/julian/src/logs/log_script.txt

Include in script.sh the command to send the email:
mail -s "Subjet" example@email.com < /dev/null

If google blocks the access to the mail server because you are using a non-secure access, you can enable less-secure access in your account settings:
 https://support.google.com/accounts/answer/6010255?hl=es