US Data Center: Inbound Gateway

If you are installing in the US Data Centers please follow the instructions below. Otherwise go to the EU Data Center: Inbound Gateway documentation.

Written By Michel Young

Last updated 8 days ago

Apps → Google Workspace → Gmail → Spam, phishing, and malware → Inbound Gateway

Scroll to the section “Inbound gateway” and hover over and click the edit pencil. Enable Inbound gateway if it is not already enabled.

The inbound gateway setting is where you specify to Google what servers mail may pass through before the final delivery. Google needs to account for not only Google, but also INKY IPs. By adding these IPs, each email’s entire journey from initial entry into Google through INKY processing and the return journey to Google is accounted for. There are a total of twenty (20) INKY IPs and twenty-eight (28) Google IP blocks. It is recommended to add the INKY IPs first and save your work (blue save button) prior to installing the Google IPs as the Google UI times out and you will need to redo the installation.

INKY controlled IPs:

Example
3.132.108.44

Example
3.132.222.232

Example
3.231.237.226

Example
13.52.203.50

Example
34.210.15.192

Example
52.60.91.15

Example
54.176.221.149

Example
99.79.118.75

Example
100.21.157.149

Example
100.24.129.5

Example
3.132.208.199

Example
13.59.96.180

Example
35.166.188.152

Example
44.224.15.38

Example
50.17.62.222

Example
52.4.92.69

Example
52.8.44.33

Example
52.52.2.239

Example
54.225.87.32

Example
52.60.96.218

Example
52.60.185.242

Click the blue save button and then add the next section

Google controlled IP Blocks:

Example
35.190.247.0/24

Example
35.191.0.0/16

Example
66.102.0.0/20

Example
64.233.160.0/19

Example
66.249.80.0/20

Example
72.14.192.0/18

Example
74.125.0.0/16

Example
108.177.8.0/21

Example
108.177.96.0/19

Example
130.211.0.0/22

Example
172.217.0.0/19

Example
172.217.32.0/20

Example
172.217.128.0/19

Example
172.217.160.0/20

Example
172.217.192.0/19

Example
172.253.56.0/21

Example
172.253.112.0/20

Example
173.194.0.0/16

Example
207.126.144.0/20

Example
209.85.128.0/17

Example
216.58.192.0/19

Example
216.239.32.0/19

Example
2001:4860:4000::/36

Example
2404:6800:4000::/36

Example
2607:f8b0:4000::/36

Example
2800:3f0:4000::/36

Example
2a00:1450:4000::/36

Example
2c0f:fb50:4000::/36

Click the blue save button and then add the next section.

Check:	Automatically detect external IP (recommended)
UNCHECK:	Reject all mail not from gateway IPs
Check:	Require TLS for connections from the email gateways listed above
Check:	Message is considered spam if the following header regexp match

Regexp:

Example
X-IPW-SCL: ([56789]|10)

Check:

Disable Gmail Spam evaluation on mail from this gateway; only use header value

Click the blue save button to save your work.

EU Data Center: Hosts

EU Data Center: Inbound Gateway