1) Make sure your hostname reflects your public dns record
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/set-hostname.html
We edited our DNS to have a public dns of "webserver.mydomain.com"
So, we edited key file:
sudo nano /etc/sysconfig/network
HOSTNAME=webserver.mydomain.com
and did a "sudo reboot"
2) Install SSMTP
sudo yum install ssmtp
3) Configure ssmtp.conf
a) sudo nano /etc/ssmtp/ssmtp.conf
b) Change:
mailhub=smtp.gmail.com:587
UseSTARTTLS=Yes
AuthUser=yourname@gmail.com
AuthPass=yourpassword
4) If you have problems, turn on debug mode
In ssmtp.conf, put first line: Debug=Yes
It will log everything to:
sudo nano /var/log/maillog
5) Edit ./etc/ssmtp/revaliases
root:Devin Johnson<myname@myemail.com>:smtp.gmail.com:587
6) Edit php.ini
a) sudo nano /etc/.php.ini
b) Search on "mail function"
c) Change sendmail_path to point to ssmtp
sendmail_path = /usr/sbin/ssmtp -t -f 'djohnson@mydomain.com'
6) If you can send emails, but the name of the "from" email is Apache, add this to your PHP:
$headers = 'From: Devin Johnson<djohnson@stockmarketmba.com>' . "\r\n" .
'Reply-To: djohnson@stockmarketmba.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($email,$subject,$strBody, $headers);