Add New Public Key
The Add New Public Key drawer opens when you click Add New Public Key on the DKIM Settings page. Use it to register a DKIM public key so that receiving mail servers can verify DKIM signatures for your domain. The same drawer opens as Edit Public Key when you click an existing key in the public key list, letting you update its value or remove it.
Fields
| Field | Description |
|---|---|
| Selector | The DKIM selector that identifies which public key to use for verification. The selector forms part of the DNS record name (e.g. selector._domainkey.example.com). This field cannot be changed after the key is saved. |
| Record Type | The type of DNS record that holds the public key: CNAME (points to a hosted record) or TXT (contains the key data directly). This field cannot be changed after the key is saved. |
| Record Value | The value of the DNS record. For CNAME records, enter the hostname the record should point to (e.g. dkim.example.com). For TXT records, enter the full DKIM key string (e.g. v=DKIM1; k=rsa; p=…). |
| TTL | Time To Live in seconds: how long DNS resolvers should cache this record before re-checking. The default value of 3600 (one hour) is appropriate for most configurations. |
| Description | An optional label to help you identify this key, such as the name of the sending service that uses it. |
Click Save to add the key. The new key appears in the public key list on the DKIM Settings page.
Note: Selector and Record Type cannot be edited after a key is saved. If you need to change either field, delete the existing key and create a new one.
Editing or removing an existing key
When you open the drawer for an existing key, its Selector, Record Type, Record Value, TTL, and Description are pre-filled. You can update the Record Value, TTL, and Description, then click Save to apply the changes.
A Delete button also appears in this view. Clicking it asks you to confirm before permanently removing the key from your domain's DKIM configuration.
Closing the drawer, either by saving, deleting, or clicking away, returns you to the DKIM Settings page.
Related Topics
- DKIM Settings — View and manage all DKIM public keys and policy settings for your domain
- What is DKIM? — Introduction to DKIM and its role in email authentication