# Why should I configure a sending domain for an email signature tool?

### Why DNS? 

When you set up a signature in Scribe, it contains numerous URLs (such as logos, profile pictures, icons, website addresses, etc.)\
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To track the conversion rate from your signature's marketing elements, all these URL domains are shortened using our default domain, sendassets.io.\
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While you can retain this domain, it's not the optimal choice. Spam filters tend to flag emails containing numerous URLs that point to a different domain than the sender's email domain.\
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That's why we offer the option to replace this default domain with a subdomain from your primary domain. This subdomain is referred to as a sending domain.\
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For instance, if your email address is <joe@my-company.com> you can configure a sending domain such as `email-signature.my-company.com` to keep spam filter content.

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