# SSO errors - some emails receive "Validation failed: Primary email is not allowed."

**URL:** <https://meta.discourse.org/t/sso-errors-some-emails-receive-validation-failed-primary-email-is-not-allowed/144484>\
**Category:** SSO\
**Created:** [16 במרץ,‏ 2020,‏ 3:41pm UTC](https://meta.discourse.org/t/sso-errors-some-emails-receive-validation-failed-primary-email-is-not-allowed/144484 "2020-03-16T15:41:44Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Stephen](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/stephen/32/95011_2.png) [@Stephen](https://meta.discourse.org/u/Stephen)\
**Post date:** [16 במרץ,‏ 2020,‏ 5:13pm UTC](https://meta.discourse.org/t/sso-errors-some-emails-receive-validation-failed-primary-email-is-not-allowed/144484/2 "2020-03-16T17:13:31Z")

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> [@bvdrie72](#):
>
> The email addresses do not exist in discourse and they are valid emails

Is there anything common to the email addresses? Their length? Any symbols? Unicode characters?

If we can identify why they’re being rejected it should be possible to answer whether the rejection criteria in 2.3.9 has changed since.

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