# Email issue -- Unknown To: Address - Private Message

**URL:** <https://meta.discourse.org/t/email-issue-unknown-to-address-private-message/68577>\
**Category:** Product Support\
**Created:** [23 Agosto, 2017 03:47 UTC](https://meta.discourse.org/t/email-issue-unknown-to-address-private-message/68577 "2017-08-23T03:47:32Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)\
**Post date:** [23 Agosto, 2017 08:46 UTC](https://meta.discourse.org/t/email-issue-unknown-to-address-private-message/68577/2 "2017-08-23T08:46:59Z")

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Amazon SES rewrites the “Message-IDs” of emails sent through it. This breaks one of Discourse’s security features related to incoming email.

To make it work, you can disable the “find related post with key” site setting, but be aware that it does open up the potential for users to be impersonated by email.

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_[View the full topic](https://meta.discourse.org/t/email-issue-unknown-to-address-private-message/68577)._