Handshake maintains highly reputable emailing domains to ensure that emails are delivered. However, email delivery can sometimes fail due to the various systems in between Handshake and students which are designed to prevent email abuse. In order to maintain high deliverability, Handshake monitors and acts on spam scores, domain blocking, IP throttling and more.
In addition to unblocking IPs and domains, please identify any internal limitations you may have with receiving email and surface them to your Handshake Relationship Manager.
(e.g. 5k rate limit for recipients every hour)
Unblock by IP
We send email from a dedicated set of IP addresses; please allow access to all of these:
US IPs:
192.237.159.131
159.112.252.237
161.38.192.196
161.38.198.110
192.237.159.132
159.112.247.178
159.112.241.1
192.237.158.52
161.38.199.254
159.112.247.179
69.72.46.73
104.130.123.85
192.237.159.133
159.112.247.180
69.72.44.24
159.135.237.56
159.112.247.182
69.72.46.79
161.38.197.221
159.135.226.83
69.72.40.228
159.112.242.178
159.112.247.181
UK/EU IPs:
161.38.207.129
141.193.33.13
161.38.206.150
Unblock by Domain (Optional)
We only send email from these domains:
joinhandshake.com
notifications.joinhandshake.com
mail.joinhandshake.com
m.joinhandshake.com
g.joinhandshake.com
cm.joinhandshake.com
joinhandshake.co.uk
notifications.joinhandshake.co.uk
mail.joinhandshake.co.uk
m.joinhandshake.co.uk
g.joinhandshake.co.ukHow to Unblock if you use Google Apps
You'll need to have a paid subscription for G Suite in order to unblock email domains/IP addresses. With G Suite Basic or above, you can use this guide to unblock email by domain and IP address. For more help, use the general guidelines for bulk emailing, recommended by Google (if you are emailing using Handshake).
How to Unblock if you use Microsoft Office 365
For Office 365 admin portals - unblocking the above IPs/domains can be accomplished by following these instructions.
Note: Messages may also be automatically routed to the new 'Clutter' folder. Please refer to this Microsoft guide for more information on how to manage your Clutter preferences. This guide will also walk you through enabling/disabling this feature if mail is being sent there that you should be receiving in your general inbox.