Title: Conditional fields in “Additional headers”
Last modified: August 27, 2021

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# Conditional fields in “Additional headers”

 *  Resolved [wrip](https://wordpress.org/support/users/wrip/)
 * (@wrip)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/conditional-fields-in-additional-headers/)
 * I tried conditions in the “Additional headers” but this is giving me _“invalid
   mail header fields”_ error. This is what I am trying to achieve:
 *     ```
       [head_office_selected]
       Reply-To: headoffice@localhost.com
       [/head_office_selected]
   
       [europe_selected]
       Reply-To: europe@localhost.com
       [/europe_selected]
       ```
   
 * Is there another way to do this?

Viewing 1 replies (of 1 total)

 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [4 years, 8 months ago](https://wordpress.org/support/topic/conditional-fields-in-additional-headers/#post-14810248)
 * Yes, you can but you need to write it on one line, like this:
 * `[head_office_selected]Reply-To: headoffice@localhost.com[/head_office_selected][
   europe_selected]Reply-To: europe@localhost.com[/europe_selected]`
 * You also need to make sure in this case that your conditional logic is defined
   in such a way that head office and Europe cannot both be selected. If this can
   be the case, than you need to change the code a little more to make sure your
   headers are always valid

Viewing 1 replies (of 1 total)

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## Tags

 * [Conditional Fields for Contact Form 7](https://wordpress.org/support/topic-tag/conditional-fields-for-contact-form-7/)

 * 1 reply
 * 2 participants
 * Last reply from: [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * Last activity: [4 years, 8 months ago](https://wordpress.org/support/topic/conditional-fields-in-additional-headers/#post-14810248)
 * Status: resolved