Email Whitelisting - Technical Guide
There are three steps which should be performed by your organisation's IT team to reliably receive Teamgage reminder/notification emails:
- IP Whitelisting on the inbound mail gateway
- Domain/Sender Whitelisting on the spam filtering appliance
- Safe Senders List on the email client to ensure images are displayed correctly
These steps may differ depending on which software, providers and network architecture is used by your organisation and will need to be interpreted as appropriate for your unique environment.
Inbound Mail Gateway (or Email Security/Spam Filter)
For reliable delivery of Teamgage notification emails, whitelisting needs to be applied beyond that of a casual sender, to ensure that emails are not delayed or incorrectly marked as spam. This is in part due to the frequency and volume of Teamgage notifications being sent to your organisation.
IP Whitelisting
Teamgage sends reminder emails using SendGrid, configured with a Mail Transfer Agent (MTA) on our own dedicated IP address. This IP needs to be whitelisted to bypass greylisting and repudiation checks, as these fluctuate based on the actions of third-parties and can be subject to false-positives and boycotts from time to time.
IP Addressee: 168.245.19.244
Required step:
- Mimecast: Add a “Permitted Senders Policy” specifying “Validity” as follows:More info: https://community.mimecast.com/docs/DOC-1427
- Source IP Range (CIDR notation):
- 168.245.19.244/32
- Trend Micro HES: Under “IP Repudiation” > “Approved/Blocked”:
- On the “Approved” tab, under “IP Addresses”, add the IP address:
- 168.245.19.244
Domain/Sender Whitelisting
Teamgage notification emails originate from our company domain, along with other support and administrative correspondence.
Sender Domain: teamgage.com
Return Path/Return Address Domain: sg.teamgage.com
Required step:
- Mimecast:Add a “Permitted Senders Policy” (or add to the one above) specifying “Emails From” as follows:
- Addresses Based On: select either “The Message From Address” or “Both”.
If you are uncomfortable with this setting, be sure to also add sg.teamgage.com below. - Applies From, Email Domain, specifically: teamgage.com
- Addresses Based On: select either “The Message From Address” or “Both”.
- Trend Micro HES: Under “Approved Senders”:
- Managed Domain: Select the relevant email domain(s) used by your staff
- Add: *@teamgage.com then click “Approve Sender”
- Add: *@sg.teamgage.com then click “Approve Sender”
We recommend whitelisting both the Sender/From Address and Return Path/Return Address domains as some appliances filter on either or both of these fields.- Teamgage has configured security features including SPF and DKIM for this sending domain. This means that your mail gateway is able to verify that emails with a From Address of @teamgage.com were in fact sent by Teamgage, and so the above sender-domain policy can be applied in a secure manner.
Images in Mail Clients (or Safe Senders Lists)
To improve employee engagement and provide a consistent brand experience, the email client for your users should be configured to always render images in emails sent by Teamgage. Some email clients such as Outlook also include a secondary spam filter, which needs to be configured correctly.
This can usually be achieved by adding @teamgage.com to your users’ Safe Senders List.
- Office 365A Safe Senders List can be configured in bulk using the Exchange Online PowerShell cmdlets.This will also propagate to Outlook 2013 (and newer) when it connects to an account in Exchange Mode.More information:
- Exchange Powershell: Set-MailboxJunkEmailConfiguration (Microsoft Docs)
- Exchange Powershell: Set-MailboxJunkEmailConfiguration (Microsoft Docs)
- Outlook (without Office 365/Exchange)A Safe Senders List can be deployed using Group Policy, the Office Customization Tool, or by deploying specific registry settings.More information:
- Configure junk email settings in Outlook 2013
- How to deploy junk email settings, such as the Safe Senders list, by using Group Policy
Note: For Office 2016 and 2019 use 16.0 as the version placeholder: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Options\Mail - Administrative Template files (ADMX/ADML) and Office Customization Tool for Office 365 ProPlus, Office 2019, and Office 2016
If this is not possible, then as a last resort you may consider adding noreply@teamgage.com to your company email address book/directory.
Please ensure that you test this configuration, and contact Teamgage support if you have any issues.
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