Sending emails using Gmail and msmtp on Ubuntu / Debian

setup-msmtp-for-gmail.sh

#!/bin/sh
# Sending emails using Gmail and msmtp
# Author: [Josef Jezek](http://about.me/josefjezek)
# Donate: [Gittip](https://www.gittip.com/josefjezek)
# Link: [Gist](https://gist.github.com/6194563)
# Usage: setup-msmtp-for-gmail.sh

sudo apt-get update -q
sudo apt-get install msmtp-mta ca-certificates heirloom-mailx -yq

if command -v zenity >/dev/null; then
  GMAIL_USER=$(zenity --entry --title="Gmail username" --text="Enter your gmail username with domain ([email protected]):")
  GMAIL_PASS=$(zenity --entry --title="Gmail password" --text="Enter your gmail password:" --hide-text)
else
  read -p "Gmail username with domain ([email protected]): " GMAIL_USER
  read -p "Gmail password: " GMAIL_PASS
fi
 
echo # an empty line
 
if [ -z "$GMAIL_USER" ]; then echo "No gmail username given. Exiting."; exit -1; fi
if [ -z "$GMAIL_PASS" ]; then echo "No gmail password given. Exiting."; exit -1; fi

sudo tee /etc/msmtprc >/dev/null <<__EOF
# Accounts will inherit settings from this section
defaults
auth            on
tls             on
tls_certcheck   off
# tls_trust_file  /etc/ssl/certs/ca-certificates.crt
logfile /var/log/msmtp.log

# A first gmail address
account   gmail
host      smtp.gmail.com
port      587
from      $GMAIL_USER
user      $GMAIL_USER
password  $GMAIL_PASS

# A second gmail address
account   gmail2 : gmail
from      [email protected]
user      [email protected]
password  password

# A freemail service
account   freemail
host      smtp.freemail.example
from      [email protected]
user      joe.smith
password  secret

# A provider's service
account   provider
host      smtp.provider.example

# Set a default account
account default : gmail
__EOF

sudo chmod 600 /etc/msmtprc
sudo chown -R www-data:www-data /etc/msmtprc

HOST=$(hostname)

sudo mail -vs "Email relaying configured at ${HOST}" $GMAIL_USER <<__EOF
The postfix service has been configured at host '${HOST}'.
Thank you for using this postfix configuration script.
__EOF
 
echo "I have sent you a mail to $GMAIL_USER"
echo "This will confirm that the configuration is good."
echo "Please check your inbox at gmail."

You can download and run this using a one-liner:

wget https://gist.github.com/josefjezek/6194563/raw/setup-msmtp-for-gmail.sh && chmod +x setup-msmtp-for-gmail.sh && ./setup-msmtp-for-gmail.sh

Thank you, it is what I am looking for ... unfortunately it doesn't work due to increased google security ...

Someone just tried to sign in to your Google Account [email protected] from an app that doesn't meet modern security standards.
Details:
Saturday, December 19, 2015 12:56 AM (Pacific Standard Time)
yyy, OR, USA*
We strongly recommend that you use a secure app, like Gmail, to access your account. All apps made by Google meet these security >standards. Using a less secure app, on the other hand, could leave your account vulnerable. Learn more.

If you decide update your script it will be useful.
Thank you.

Yeah

Thank you Sir, wonderful script.
As for the google security issue:

6. Enable "Less Secure Apps" In Gmail

By default, only the most secure sign-ins, such as logging in to Gmail on the web, are allowed for your Gmail account. To permit relay requests, log in to your Gmail account and turn on Allow less secure apps.
For more information, review the Google Support document "Allowing less secure apps to access your account."

source: Configure Postfix to use Gmail as a Mail Relay

tls_certcheck   off

why?

Regarding enabling less secure apps, it's better to enable 2-step verification and create a per-app password.

I am trying on Android to send mail... From PHP
I require to edit msmtp.cnf file for use mail() function I copied configuration code from your shell script. but not working .. for Android. If you know something can you provide info?? Please help sir

Hi, the scripts worked. Thank you for that, but the mail command still doesn't send mails..