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**Category:** Elasticsearch\
**Created:** [February 21, 2018, 12:39am UTC](https://discuss.elastic.co/t/unknown-setting-xpack-notification-email-html-sanitization-allow-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/120746 "2018-02-21T00:39:38Z")\
**Posts on this page:** 3\
**Page:** 1
**Author:**  [@Karthik\_Ramachandran](https://discuss.elastic.co/u/Karthik_Ramachandran)\
**Post date:** [February 21, 2018, 12:39am UTC](https://discuss.elastic.co/t/unknown-setting-xpack-notification-email-html-sanitization-allow-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/120746/1 "2018-02-21T00:39:38Z")
Trying to configure sanitization settings for eMail notifications but when ES is started, i'm getting error
java.lang.IllegalArgumentException: unknown setting [xpack.notification.email.html.sanitization.allow] please check that any required plugins are installed, or check the breaking changes documentation for removed settings
ES Version 6.2
Below are various testing done and results.
Used Windows OS, and it works fine with settings
xpack.notification.email.html.sanitization:
allow: \_styles,\_tables,\_blocks,\_links,\_formatting
Used Linux (Redhat), and works fine for basic watcher enabled/mail settings **without** sanitization settings.
Using the same Linux, when sanitization settings are added, getting error as stated above
Any guidance would be helpful.
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**Author:**  [@TimV](https://discuss.elastic.co/u/TimV)\
**Post date:** [February 21, 2018, 5:19am UTC](https://discuss.elastic.co/t/unknown-setting-xpack-notification-email-html-sanitization-allow-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/120746/2 "2018-02-21T05:19:38Z")
This was fixed in 6.2.2 (that was just released)
[https://www.elastic.co/guide/en/elasticsearch/reference/6.2/xes-6.2.2.html](https://www.elastic.co/guide/en/elasticsearch/reference/6.2/xes-6.2.2.html)
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**Author:**  [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 21, 2018, 5:19am UTC](https://discuss.elastic.co/t/unknown-setting-xpack-notification-email-html-sanitization-allow-please-check-that-any-required-plugins-are-installed-or-check-the-breaking-changes-documentation-for-removed-settings/120746/3 "2018-03-21T05:19:40Z")
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