title: Output additional Text in Powermail if specific Checkbox is checked
body: <p>so here's my problem: I tried to output an additional text once a specific checkbox is checked in powermail. </p>
  
  <p>The select field contains multiple options and all are selectable of course, but when i.e. field 1 is checked the sender should have the standard text in the mail plus "Lorem ipsum", but when the field isn't checked there should be no additional output at all. </p>
  
  <p>I could find a solution for altering texts depending on a selection for single selects / dropdowns and it works like a charm, but for a reason the multi-select doesn't work at all. I can't figure out why so maybe someone can help.</p>
  
  <p>TS:</p>
  
  <pre><code>lib.serverex = CASE
  lib.serverex {
  
      key.data = GP:tx_powermail_pi1|field|produktang|1
      key.intval = 1
      1 = TEXT
      1.value = Lorem Ipsum
  
     #Default
      default = TEXT
      default.value =
  }
  </code></pre>
  
  <p>The email in powermail looks like this:</p>
  
  <pre><code>Some standard text...
  
  {f:cObject(typoscriptObjectPath:'lib.serverex', data:'{produktang}')}
  </code></pre>
  
  <p>The checkbox configuration inside the form (id: produktang): </p>
  
  <pre><code>first product | 1
  second product | 2
  third product | 3
  fourth product | 4
  fifth product | 5
  </code></pre>
  
  <p>Either it appends it no matter what the input is/checked boxes are or it doesn't send the additional text at all. I'm probably missing something here.</p>
  
  <p>Thanks in advance! </p>