If you have an unused domain name that was only purchased because it was similar to your canonical domain name, then you need to protect if from being used by spammers to spoof messages or hurting your brand reputation.
Add these DNS records at your DNS provider (e.g., Cloudflare, Namecheap, GoDaddy):
| Purpose | Type | Name | Content | Notes |
| SPF | TXT | @ | v=spf1 -all | The "@" symbol is used as an abbreviation for the root domain (i.e., domain.com). |
| DMARC | TXT | _dmarc | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; | DMARC records are used for spam reports. |
| DKIM | TXT | *._domainkey | v=DKIM1; p= | A DKIM record is not necessary on an alias/unused domain name. |
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