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Use SMTP settings to send mail from a printer, scanner, or app

Use G Suite SMTP settings to set up a device or app to send email.

You can set up your on-premises printer, scanner, fax, or application to send email through G Suite. Depending on your requirements, the available options are:

  • G Suite SMTP relay service—Send mail from your organization by authenticating with the IP addresses. You can send messages to anyone inside or outside of your domain.
  • Gmail SMTP server—Send mail to anyone inside or outside of your domain. This option requires you to authenticate with your Gmail or G Suite account and password. 
  • Restricted Gmail SMTP server—Send messages to Gmail or G Suite users only. This option does not require you to authenticate.

Note: Our support team can't assist with configuration settings. For details about configuring your device or application to send SMTP messages, refer to its respective documentation.

Step 1: Choose your configuration option

The following table lists the configuration requirements based on what’s supported by your device or application. You configure these options within the device or application.

G Suite SMTP relay (recommended) Gmail SMTP server Restricted Gmail SMTP server
Sending limits
A registered G Suite user can't relay messages to more than 10,000 recipients per day. For full SMTP relay limits, see Sending limits for the SMTP relay service. 2,000 Messages per day. See Gmail sending limits. Per user receiving limits apply. This option restricts sending messages to Gmail or G Suite users only.
Anti-spam filters

Suspicious emails may be filtered.

Fully qualified domain name of SMTP service
smtp-relay.gmail.com smtp.gmail.com aspmx.l.google.com
Configuration requirements
  • Options: Port 25, 465, or 587
  • Secure Socket Layer (SSL)/Transport Layer Security (TLS) protocols.
  • One or more static IP addresses are required.
  • Port 465 (SSL required)
  • Port 587 (TLS required)
  • Dynamic IPs allowed
  • Port 25
  • TLS not required
  • Dynamic IPs allowed 
  • Mail can only be sent to Gmail or G Suite users.
Authentication requirements
IP address provides authentication. Your full Gmail or G Suite email address is required for authentication. None

Step 2: Send mail from your device or application

To send mail from your device or application using Gmail servers, follow the steps for the option you chose.

Set up G Suite SMTP relay in the Admin console (recommended)

To use the G Suite SMTP relay (recommended and most secure setup option):

  1. Add your network IP range to the SMTP relay service.
  2. Configure your device to connect to smtp-relay.gmail.com on port 25, 465, or 587.
  3. For more details about using this setting, see SMTP relay service setting.

Use the Gmail SMTP Server

If you connect using SSL or TLS, you can send mail to anyone with smtp.gmail.com.

  1. Connect to smtp.gmail.com on port 465, if you’re using SSL. (Connect on port 587 if you’re using TLS.)
  2. Sign in with a Google username and password for authentication to connect with SSL or TLS.
  3. Ensure that the username you use has cleared the CAPTCHA word verification test that appears when you first sign in.
  4. Ensure that the account has a secure password.

Use the restricted Gmail SMTP Server

If your device or application doesn’t support SSL, you can only send mail to Gmail or G Suite users.

Use the restricted SMTP server aspmx.l.google.com.

  1. Connect to aspmx.l.google.com on port 25.
  2. Configure an SPF record for your domain with the IP address of the device or application to ensure that recipients don’t reject mail sent from it.
  3. In your Google Admin console, add this IP address to the Email Whitelist box.

    For example, if your sending device sends from 123.45.67.89, add that address to your SPF record without removing the G Suite mail servers from the record: v=spf1 ip4:123.45.67.89 include:_spf.google.com ~all.
 To test your SPF record, use this Domain Name System (DNS) lookup tool.

 

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