DomainKeys Identified Mail (DKIM) is an email security protocol. It uses message encryption to authenticate an email domain. This process checks if an email was altered during transmission and ensures the integrity of the message body.
To set a DKIM record:
1. In the Direct Mail console, on the Email Domains page, find the configuration information for the domain name and retrieve the record value.
2. After you retrieve the record value, log on to the Domain Names console. Add the following TXT DNS record under the primary domain name.
3. To verify the record, run the `nslookup -qt=txt aliyun-ap-southeast-1._domainkey.xxx.example.net` command. Replace `xxx.example.net` with your subdomain. If the domain name is parsed successfully, the command returns the record value.
Previously, the DKIM record value was based on your Alibaba Cloud account and the region of the Direct Mail console. A new record was not required for different domain names. If your account and region remained the same, you could use the same record value for your domain name resolution.
Currently, each domain name has a unique DKIM record value.