Adding dynamic second email address to Contact Form plugin

Question

According to the Contact Form plugin docs, I can do:

<input type="hidden" name="toEmail" value="{{ '[email protected], [email protected]' | hash }}">

That seems to work fine, but one of those email addresses I want to add dynamically. I've tried the following, but none seem to work, generally sending to just the second email address:

{# adding first email as var #}
{% set firstEmail = '[email protected]' %}
<input type="hidden" name="toEmail" value="{{ firstEmail ~ ', [email protected]' | hash }}">%}

{# adding first email as var and avoiding | hash #}
{% set firstEmail = '[email protected]' %}
<input type="hidden" name="toEmail" value="{{ firstEmail ~ ', [email protected]' }}">%}

{% set firstEmail = '[email protected]' %}
{% set emails = firstEmail ~ ', [email protected]' %}
<input type="hidden" name="toEmail" value="{{ emails | hash }}">
{# RESULT: <input type="hidden" name="toEmail" value="[email protected], [email protected]">#}

{# adding first email as var with extra quotes #}
{% set firstEmail = '[email protected]' %}
{% set emails = "'" ~ firstEmail ~ ", [email protected]'" %}
<input type="hidden" name="toEmail" value="{{ emails | hash }}">
{# RESULT: <input type="hidden" name="toEmail" value="e3a44b3632212521351d8d44af34742a63f6516e'[email protected], [email protected]'"> #}

Any ideas?

Answer 1

Both, the example from the Contact Form docs

{{ '[email protected],[email protected]'|hash }}

...and the 3rd example snippet in your question

{% set firstEmail = '[email protected]' %}
{% set emails = firstEmail ~ ',[email protected]' %}

{{ emails|hash }}

...output exactly the same string for me! So I think you have to search for an answer to your issue elsewhere.