Setup Exim to Send Email Using Gmail in Debian


Port 25 in VULTR is blocked by default. If you need to send out email without contacting VULTR support, you can follow this tutorial to setup your Exim to send email via Gmail SMTP server.

Install Exim4

apt-get install exim4

Configuration

Run following command to configure Exim4.

dpkg-reconfigure exim4-config

Choose this option when asked: “mail sent by smarthost; no local mail“.

Fill in the rest of the fields:

System mail name: YOUR_HOSTNAMEIP-addresses to listen on for incoming SMTP connections: 127.0.0.1 ; ::1Other destinations for which mail is accepted: <BLANK>Visible domain name for local users: <BLANK>IP address or host name of the outgoing smarthost: smtp.gmail.com::587Keep number of DNS-queries minimal (Dial-on-Demand)? NoSplit configuration into small files? NoRoot and postmaster mail recipient: <BLANK>

Open and edit /etc/exim4/exim4.conf.template.

Search for:

.ifdef DCconfig_smarthost DCconfig_satellite

Then add these lines after it:

send_via_gmail:    driver = manualroute    domains = ! +local_domains    transport = gmail_smtp    route_list = * smtp.gmail.com

Remove other smarthost blocks that contains domains = ! +local_domains.

Search for:

begin authenticators

And add these lines after it:

gmail_login:    driver = plaintext    public_name = LOGIN    client_send = : YOUR_GMAIL_ACCOUNT@gmail.com : YOUR_GMAIL_PASSWORD

Remove other authenticator blocks that contains public_name = LOGIN.

Search for:

transport/30_exim4-config_remote_smtp_smarthost

And add these lines after it:

gmail_smtp:    driver = smtp    port = 587    hosts_require_auth = $host_address    hosts_require_tls = $host_address

Save and close /etc/exim4/exim4.conf.template.

Apply the new configuration:

update-exim4.conf

Restart Exim4 service:

/etc/init.d/exim4 restart

Testing

Now send a test email using following command:

echo 'Test Message from VULTR.' | mail -s 'Test Message' YOUR_EMAIL_ADDRESS

Check /var/log/exim4/mainlog if any errors occurred. You can now send emails from your VULTR VPS.

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