Error message in contact 7 form

JeanneStreit

I have an error message in the contact 7 from, which I do not understand.

What do I have to change in the syntax? (please see screenshot below)

Thank you for your help!

Pablo

Hello,

You should be sure, that your mail header field is the same as in official documentation of Contact Form 7 plugin:

https://contactform7.com/configuration-errors/invalid-mail-header/

We did not change anything in the core of that plugin.

Thanks

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