Abtrac Newsletters: Whitelist information

We regularly send Tips & Tricks emails to Abtrac clients. These emails detail new, relevant or topical features in Abtrac.

The monthly Abtrac newsletters are sent via two email service providers (ESP): Hubspot and MailChimp.

As a general rule we use Hubspot for Australian and International companies, and New Zealand newsletters are sent through MailChimp.

Whilst we do our best to ensure the mail gets through private email domains tend to have more aggressive firewalls and spam filters than Gmail or other free webmail providers. Sometimes, these network firewalls and filters can block our campaigns.

If we notice that mail to you is being blocked then whitelisting our ESPs is a possible solution.

If you’re having problems receiving Abtrac News the best way to ensure ‘the mail prevails’ is to add the following IP addresses to your white list.

(If the list below doesn’t make sense to you – your IT person should be able to help)

MailChimp IPs: https://mailchimp.com/about/ips

  • 205.201.128.0/20
  • 198.2.128.0/18

Keep in mind that the numbers above are not single IP addresses. In order to see which IP addresses each Classless Inter-Domain Routing (CIDR) contains, use a CIDR calculator like this one. For more information about IP addresses and ranges formats, try this resource.


Hubspot IPs: 

  • 50.31.44.102
  • 50.31.44.103
  • 50.31.44.104
  • 50.31.44.105

Hubspot Domains:

  • mail1.shared.hubspot.com
  • susr_mail1@hubspot.com
  • susr_mail1_auth@hubspot.com