Allowlisting - Quick Reference - IPs, Headers & URLs

Please ensure you have read "Allowlisting - Introduction" before proceeding. This is so you understand which allowlisting approach is best suited for your email environment.

When applying allowlists to your email servers and/or email filtering solutions, please refer to the quick reference information below.

Be careful not to over-allowlist and only configure what's necessary to allow GrintOps emails through.

Mail Server IPv4 Addresses:
The following are examples of domainsIPv4 addresses that may be associated with phishing-related mail server IPv4 addresses:
servers:

3.106.21.22
13.237.47.221

Note: If you need to provide your email filter with a subnet mask for the above IP Addresses, please use /32 for each IP.

Sending Domains:

Note: If you've white-labeled GrintOps , replace grintops.com and learn.grintops.com with your white-labeled domains (e.g. phish.mybusiness.com and learn.phish.mybusiness.com).

The following are examples of phishing domains that may be used in white-labeled environments:

alerting-services.com
authwebmail.com
cloud-notification-services.com
securesupportcloud.com
office-365-notifications.com
webnotifications.net
paypaypal.net
cmail31.com
authenticationsecure.com
verificationweb.net
onlineverify.net
portal-login.net
email-forwarder.net
grintops.com
learn.grintops.com

Phishing Website Domains:
The following are examples of phishing website domains:

*.authwebmail.com
*.cmail31.com
*.securesupportcloud.com
*.webnotifications.net
*.alerting-services.com
*.onlineverify.net
*.verificationweb.net
*.portal-login.net
*.cloud-notification-services.com
*.authenticationsecure.com

Should you have any difficulties with allowlisting, please don't hesitate to contact us.