IP & Email Whitelisting Guide
Ensure uninterrupted service by whitelisting necessary Domains, IPs, email addresses.
1. Domain Whitelisting
Whitelist *.schedule2.it to ensure all .schedule2.it subdomains will load.
2. IP Addresses and Ports to Whitelist
IPv4 Addresses
- 74.113.139.23
- 74.113.139.24
- 74.113.139.25
- 4.242.228.69
Ports
- Port 80 (HTTP)
- Port 443 (HTTPS)
3. Email Delivery: SendGrid Whitelisting
To ensure successful delivery of emails sent via Schedule2, please whitelist the following SendGrid IP addresses:
SendGrid IP Address
- 168.245.8.152
4. Request Sample: HTTP
Below is the sample HTTP request for retrieving IPs for whitelisting:
GET /client/v4/ips HTTP/1.1
Content-Type: application/json
Host: api.example.com
5. Response Examples
Successful Response
The JSON structure below represents a successful response when communication with whitelisted IPs is configured correctly:
{
"errors": [],
"messages": [],
"success": true,
"result": {
"etag": "a8e453d9d129a3769407127936edfdb0",
"ipv4_cidrs": ["199.27.128.0/21"],
"ipv6_cidrs": ["2400:cb00::/32"]
}
}
Failed Response
The JSON structure below represents a failed response, which may occur if the required IPs or ports are not whitelisted:
{
"errors": [
{
"code": 7003,
"message": "No route for the URI"
}
],
"messages": [],
"success": false,
"result": null
}
By updating your whitelisting configurations and using these response examples for troubleshooting, you can prevent service interruptions and ensure seamless communication.
If you have any further questions or need assistance, please contact our support team.
Update History
May 11, 2026
IP Address and Email Whitelisting Guide.