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Ubuntu sendmail using smtp.gmail.com
#!/bin/bash
HOST=$(hostname)
function install_postfix() {
echo | sudo debconf-set-selections <<__EOF
postfix postfix/root_address string
postfix postfix/rfc1035_violation boolean false
postfix postfix/mydomain_warning boolean
postfix postfix/mynetworks string 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
postfix postfix/mailname string $HOST
postfix postfix/tlsmgr_upgrade_warning boolean
postfix postfix/recipient_delim string +
postfix postfix/main_mailer_type select Internet with smarthost
postfix postfix/destinations string $HOST, localhost.localdomain, localhost
postfix postfix/retry_upgrade_warning boolean
# Install postfix despite an unsupported kernel?
postfix postfix/kernel_version_warning boolean
postfix postfix/not_configured error
postfix postfix/sqlite_warning boolean
postfix postfix/mailbox_limit string 0
postfix postfix/relayhost string [smtp.gmail.com]:587
postfix postfix/procmail boolean false
postfix postfix/bad_recipient_delimiter error
postfix postfix/protocols select all
postfix postfix/chattr boolean false
__EOF
echo "Postfix should be configured as Internet site with smarthost"
sudo apt-get install -q -y postfix
}
if ! dpkg -s postfix >/dev/null;
then
install_postfix
else
echo "Postfix is already installed."
echo "You may consider removing it before running the script."
echo "You may do so with the following command:"
echo "sudo apt-get purge postfix"
echo
fi
if zenity --version >/dev/null; then
GMAIL_USER=$(zenity --entry --title="Gmail username" --text="Enter your gmail username:")
GMAIL_PASS=$(zenity --entry --title="Gmail password" --text="Enter your gmail password:" --hide-text)
else
read -p "Gmail username: " GMAIL_USER
read -sp "Gmail password: " GMAIL_PASS
fi
echo # an empty line
if [ -z "$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
if ! [ -f /etc/postfix/main.cf.original ]; then
sudo cp /etc/postfix/main.cf /etc/postfix/main.cf.original
fi
sudo tee /etc/postfix/main.cf >/dev/null <<__EOF
relayhost = [smtp.gmail.com]:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_loglevel = 1
smtp_tls_per_site = hash:/etc/postfix/tls_per_site
smtp_tls_CAfile = /etc/ssl/certs/Equifax_Secure_CA.pem
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_tls_session_cache
__EOF
echo "[smtp.gmail.com]:587 $GMAIL_USER:$GMAIL_PASS" | sudo tee /etc/postfix/sasl_passwd >/dev/null
sudo chmod 400 /etc/postfix/sasl_passwd
sudo postmap /etc/postfix/sasl_passwd
echo "smtp.gmail.com MUST" | sudo tee /etc/postfix/tls_per_site >/dev/null
sudo chmod 400 /etc/postfix/tls_per_site
sudo postmap /etc/postfix/tls_per_site
sudo service postfix restart
echo "Configuration done"
mail -s "Email relaying configured at ${HOST}" $GMAIL_USER@gmail.com <<__EOF
The postfix service has been configured at host '${HOST}'.
Thank you for using this postfix configuration script.
__EOF
echo "I have sent you a mail to $GMAIL_USER@gmail.com"
echo "This will confirm that the configuration is good."
echo "Please check your inbox at gmail."
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