> For the complete documentation index, see [llms.txt](https://docs.emaildelivery.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emaildelivery.com/docs/velocity-mta-basics/configure-dkim.md).
# Configure DKIM
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**Don't skip this step!**\
It's not uncommon for mailbox providers to block or spam folder unauthenticated mail.
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Before you send your first email, you need to add DKIM authentication to your DNS records
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Go to MTA -> Velocity MTA Servers -> DKIM tab in the backend site navigation
Click configure domains
Add domains or subdomains and a DKIM selector
You'll need to copy and paste the newly created TXT record entries into your DNS hosting provider
In our example, we'll use Cloudflare as our DNS manager, which we strongly recommend.
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**Cloudflare rocks**
Cloudflare acts as your DNS nameserver, reverse web proxy, web application firewall, SSL provider, incoming MX record mail processor, and much more
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Create a new TXT record for your domain or subdomain
Paste your selector and public key from the Velocity MTA DKIM page
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You're done
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**Trust but verify**
When you send yourself a test message to Gmail, you can verify DKIM is working by clicking the three dots then **show original**
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