> For the complete documentation index, see [llms.txt](https://docs.gethyperscale.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gethyperscale.com/faq/why-do-i-still-get-bounced-emails.md).

# Why do I still get bounced emails?

Despite validating the best possible contact details across multiple sources that go through additional layers of specialized email verification services, sent emails may still be bounced or rejected.

This can be due to one of more of the following reasons:

* You're trying to reach a valid email, but the company's email policy does not allow external email addresses unless whitelisted. This is common as a way for companies to reduce spam and especially common amongst companies who use Office 365.
* Your email domain reputation score is too low.
* You haven't properly set up your DMARC or SPF records for your domain. You can use a tool like [this](https://easydmarc.com/tools/spf-lookup) to check. Refer to [How to authenticate email (DKIM, DMARC, SPF)](/email-best-practices/how-to-authenticate-email-dkim-dmarc-spf.md)for further instructions.
* The person just left the company, and based on all publicly available records has not joined a new company. The email you have is still the most valid contact detail across all data sources.

**If you receive any bounces, simply forward the email to <support@gethyperscale.com> and we'll credit your account for that lead.**


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