Target
HENNGE Email DLP is set up with DKIM, and customers who want to add a new usage domain are targeted.
※ For adding a new usage domain, please also refer to the following article.
What are the procedures to add additional domain?
Purpose
Apply HENNGE Email DLP's DKIM to the newly added domain.
Notes
1. The content of this article is based on the product specifications as of October 2023 and may be subject to change without notice thereafter.
2. HENNGE Email DLP's administrator privileges are required for actual screen verification and configuration changes.
3. The URL of the HENNGE Email DLP user screen will differ depending on the customer's tenant.
https://console.mo.hdems.com/#/admin/[Main Domain]
※ Please change [Main Domain] to your contracted domain.
4. For cases where DKIM is not set, please refer to the following article.
DKIM Configuration
Detailed Steps and Explanations
1. Go to the HENNGE Email DLP management screen [Tenant Settings] → [DKIM], and click the [Change Domain] link.
2. Add the displayed values to the DNS TXT record of the added domain.
It is possible to copy by hovering over the name of the TXT record and the value of the TXT record.
※ The default TXT record value includes the [t=y;] (test mode) tag, so if you use it in production, please remove [t=y;].
※ If you want to enable DKIM signing for multiple domains including subdomains (e.g., sub.example.com), you need to add this TXT record for each relevant domain in the DNS.
3. Open the Command Prompt (Windows) or Terminal (Mac OS) and execute the command to confirm that the value of the set TXT record is displayed.
nslookup -type=TXT <selector name>._domainkey.<added domain> 8.8.8.8
C:\Windows\system32>nslookup -type=TXT <selector name>._domainkey.<added domain> 8.8.8.8
Server: dns.google
Address: 8.8.8.8
Non-authoritative answer:
<selector name>._domainkey.<added domain>. text =
"v=DKIM1; k=rsa; t=y; p=MIGfMA0GCSqGSIb3<omitted>dPx4QIDAQAB"
dig +short @8.8.8.8 <selector name>._domainkey.<added domain> txt
dig +short @8.8.8.8 <selector name>._domainkey.<added domain> txt
"v=DKIM1; k=rsa; t=y; p=MIGfMA0GCSqGSIb3<omitted>dPx4QIDAQAB"
4. Click [Add Domain].
5. Enter the new domain in the added line.
6. Click the [Save Changes] button.