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Migration of Cloud Mail Security

You have received a message that the current Cisco platform used for Cloud Mail Security will be replaced by a Symantec platform. The advantages for you are that this platform offers better security with more functionalities. An overview of this can be found in the contractual service description.

To ensure that you can continue to send and receive e-mails, some changes are necessary:

TXT record

Add the TXT-record PROX-AP-XG90TY4901Z to your DNS records, for all relevant domains. This is necessary to check the authenticity of your e-mail domain(s).

If you do not manage your DNS records yourself, contact your DNS administrator. If Proximus manages your DNS records, contact our DNS masters.

MX records

As soon as you receive new Cloud Mail Security credentials from us, change your MX records so that your e-mails are sent via the new platform. Add these MX records to your DNS as a priority destination:

  • 10 cluster5.eu.messagelabs.com
  • 20 cluster5a.eu.messagelabs.com

Please note: It can take up to 24 hours for your MX records to be updated. Do not delete existing MX records until the changes are effective. Once the changes are effective, delete the old MX records.

If you do not manage your DNS records yourself, contact your DNS administrator. If Proximus manages your DNS records, contact our DNS masters.

Settings for Microsoft Exchange, Office 365 and Google Apps

For Microsoft Exchange, Office 365 and Google Apps, your configuration needs to be changed. Download the Symantec administrator guide and follow the steps in chapter 3 and 4.

IP whitelisting

As soon as the service is activated on the new platform, your e-mails will come from a different source. Therefore, make sure that the IP addresses below have access to your e-mail environment. For more information, please visit symantec.com.

Subnet IP address Subnet mask Net mask IP range
216.82.240.0 255.255.240.0 /20 216.82.240.0 - 216.82.255.255
67.219.240.0 255.255.240.0 /20 67.219.240.0 - 67.219.255.255
85.158.136.0 255.255.248.0 /21 85.158.136.0 - 85.158.143.255
95.131.104.0 255.255.248.0 /21 95.131.104.0 - 95.131.111.255
46.226.48.0 255.255.248.0 /21 46.226.48.0 - 46.226.55.255
117.120.16.0 255.255.248.0 /21 117.120.16.0 - 117.120.23.255
193.109.254.0 255.255.254.0 /23 193.109.254.0 - 193.109.255.255
194.106.220.0 255.255.254.0 /23 194.106.220.0 - 194.106.221.255
195.245.230.0 255.255.254.0 /23 195.245.230.0 - 195.245.231.255
103.9.96.0 255.255.252.0 /22 103.9.96.0 – 103.9.99.255

Please note: If you do not have a firewall, you can change the settings of your router or mail server yourself. If your network infrastructure is not managed internally, make sure your service provider makes these changes.

SPF record

If you are using or want to use the Sender Policy Framework (SPF), you must create or change your SPF record to:

  • v=spf1 include:spf.messagelabs.com ~all

For more information, please visit symantec.com.

If you do not manage your DNS records yourself, contact your DNS administrator. If Proximus manages your DNS records, contact our DNS masters.

Contact us

Our employees are ready to help you!