In firmware 6.6, Auto Alert emails are generated via GRIDSMART API. In versions before 6.6 Auto Alert emails are generated via GRIDSMART API using Postmark. Postmark is a 3rd-party service provider that we route email through via the internet.   The GRIDSMART software sends an HTTP POST request to Postmark which then uses the information we send to generate an email and send it on our behalf.


Settings for versions 6.6 and up - 


Your GRIDSMART system will need the following ports open and accessible - 


api.gridsmart.com (port 443)

Settings for versions prior to 6.6 see below - (Update to the latest version as soon as you can!)


Your GRIDSMART system will need the following ports open and accessible -


api.gridsmart.com (port 443)
api.postmarkapp.com (port 443)


The following are known IP addresses used by Postmark –

•             50.31.156.109

•             34.192.253.140

•             50.31.189.120

•             50.31.208.162



If your IT group has any questions about postmark please ask them to refer to this page:

http://support.postmarkapp.com/article/800-ips-for-firewalls


Things you should know:

  • Postmark is for transnational email only.
  • A confirmed email address is required to start sending.
  • Maximum size is 10MB
  • The max number of recipients is 50 to include all CC and BCC recipients.