Title: Throws up valid header warning
Last modified: August 30, 2016

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# Throws up valid header warning

 *  Resolved [Duncan Michael-MacGregor](https://wordpress.org/support/users/duckonwater/)
 * (@duckonwater)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/throws-up-valid-header-warning/)
 * Not currently compatible with WP. Will there be an update?
 * Cheers 🙂
 * [https://wordpress.org/plugins/gravity-forms-email-blacklist/](https://wordpress.org/plugins/gravity-forms-email-blacklist/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [justinjwilson](https://wordpress.org/support/users/justinjwilson/)
 * (@justinjwilson)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/throws-up-valid-header-warning/#post-6657855)
 * Same issue. Wow.. 4 months and no response. I’ll try posting an issue on Github.
 *  [justinjwilson](https://wordpress.org/support/users/justinjwilson/)
 * (@justinjwilson)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/throws-up-valid-header-warning/#post-6657856)
 * Try clearing caches. Worked for me, anyway.
 *  [justinjwilson](https://wordpress.org/support/users/justinjwilson/)
 * (@justinjwilson)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/throws-up-valid-header-warning/#post-6657857)
 * This also works:
 * [http://gravitywiz.com/banlimit-email-domains-for-gravity-form-email-fields/](http://gravitywiz.com/banlimit-email-domains-for-gravity-form-email-fields/)

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Throws up valid header warning’ is closed to new replies.

 * ![](https://ps.w.org/gravity-forms-email-blacklist/assets/icon-256x256.png?rev
   =2888656)
 * [Gravity Forms Email Blacklist](https://wordpress.org/plugins/gravity-forms-email-blacklist/)
 * [Support Threads](https://wordpress.org/support/plugin/gravity-forms-email-blacklist/)
 * [Active Topics](https://wordpress.org/support/plugin/gravity-forms-email-blacklist/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/gravity-forms-email-blacklist/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/gravity-forms-email-blacklist/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [justinjwilson](https://wordpress.org/support/users/justinjwilson/)
 * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/throws-up-valid-header-warning/#post-6657857)
 * Status: resolved