Direct Mail:Enable IP Protection

To improve the security of sending emails through SMTP and API calls, Direct Mail provides an IP protection feature.

1. Log on to the Direct Mail console.

2. In the navigation pane on the left, choose Email Settings > IP Protection.

3. Select the Enable IP Protection checkbox and add the IP addresses, IP ranges, or IP segments that you use for sending emails to the IP address whitelist.

   Note

   This setting applies only to emails sent using SMTP or API calls. It does not affect emails sent from the console.

Note:

Enter only one IP address, IP range, or IP segment per line. The IP address whitelist supports a maximum of 10 entries.

Single IP format: xxx.xxx.xxx.xxx, such as 220.181.12.241.

IP range format: xxx.xxx.xxx.xxx-xxx.xxx.xxx.xxx, such as 220.181.12.241-220.181.12.255.

IP segment format: xxx.xxx.xxx.xxx/N, such as 220.181.12.0/24.

Do not enter private network IP addresses, such as 192.168.0.0-192.168.255.255, 172.16.0.0-172.31.255.255, or 10.0.0.0-10.255.255.255.

This feature supports sending emails using SMTP and API calls.

After you enable IP protection, the sending IP address must be in the IP address whitelist. Otherwise, emails sent from that IP address are blocked.

To ensure a high email delivery success rate, add your IP addresses to the IP address whitelist before you enable this feature for the first time. If your sending IP address changes, you must immediately update the IP address whitelist. Otherwise, your emails will fail to send.