Learn how to configure Google G Suite Business and Education editions with Symantec Email Security.cloud as your outbound email gateway.
To scan email from external sources, you must register the IP addresses or mail hosts of the points of entry into your network. These points of entry may be firewalls, routers, mail servers, or a public hosted cloud service.
The public hosted cloud services that we support are Google's G Suite Email and Microsoft Office 365. This information is for guidance only. You must retrieve up-to-date information from your public hosted service account to ensure accuracy. Your account information in the Google G Suite portal provides the inbound route information that you need to enter into the Email Security Services portal.
The Symantec.cloud infrastructure uses Google's SPF record to verify Google's IP address ranges for outbound SMTP. Once you have completed these steps, allow up to 1 hour for the changes to replicate across the Email Security.cloud infrastructure. See Set up an outbound mail gateway on Google.com for more information.
A Sender Policy Framework (SPF) record is a type of Domain Name Service (DNS) TXT record that identifies which mail servers are permitted to send email on behalf of a domain. SPF records detect and prevent spammers from sending messages with forged "From" addresses on a domain.
Symantec recommends that you include Email Security.cloud references in your SPF Record, even if your email is not generally routed outbound through Symantec.cloud. Including these references help prevent situations where email flows through Symantec servers for other reasons, such as email sent to another customer.
Implementing the SPF record also helps Symantec.cloud more accurately detect spoofed messages that pretend to be from your domain.
See Implement SPF records in Email Security.cloud
Note: Make sure to set the TXT record TTL to the lowest possible to allow quick replication across DNS servers. It may take up to 24 hours for the TXT record to replicate across the internet.
This will force internal routing for all domains provisioned to use G Suite services.