Powermail generates emails with wrong sender address (sometimes!)

[devxpoint]

I have TYPO3 12 and powermail 12.5 with typoscript config to a fixed sender emailaddress:

plugin.tx_powermail.settings.setup {
  receiver.overwrite {
    senderEmail = TEXT
    senderEmail.value = info@my-own-domain.de
  }
}

All emails to me should have this sender address "info@my-own-domain.de" and in most cases it works.
But sometimes the given user emailaddress is used as sender emailaddresses, which crashes since SPF.
Also the markers in the email subject {my_marker} are not replaced, why?

Here is a screenshot from the module:

Who can explain this behavior?

[mschwemer]

If I look at your screenshot, the email addresses, where it works, are all the same. Where it does not work, are other addresses.

Can you provide more information about your setup?

• TypoScript configuration
• flexform configuration
• are there other powermail related extensions in the site

[devxpoint]

Yes of course, where it works -> means that typoscript sets a fixed sender email address as expected. ;)

The typoscript:

plugin.tx_powermail {
  settings {
    setup {
      misc.ajaxSubmit = 1
      misc.file {
        extension = jpg,jpeg,doc,docx,pdf
        randomizeFileName = 0
        randomizePrependOriginalFileName = 1
      }
      spamshield.indicator.honeypod = 0     
      receiver.overwrite {
        senderName = TEXT
        senderName.value = My Domain
        senderEmail = TEXT
        senderEmail.value = info@my-own-domain.de
        
        replyToEmail.value >
        replyToEmail = TEXT
        replyToEmail.data = GP:tx_powermail_pi1|field|e_mail_adresse
      
        replyToName.value >
        replyToName = TEXT
        replyToName.data = GP:tx_powermail_pi1|field|name        
      }      
      sender.overwrite {
        senderName = TEXT
        senderName.value = My Domain
        senderEmail = TEXT
        senderEmail.value = info@my-own-domain.de    

        email = TEXT
        email.data = GP:tx_powermail_pi1|field|e_mail_adresse        

        name = TEXT
        name.data = GP:tx_powermail_pi1|field|name            
      }
    }
  }
}

Flexform:

Is there a misconfiguration???

I also use EXT:powermail_cond within this form, to show and hide some fields.
I tested several options -> all are working. Powermail_cond should not be the reason.

It's funny that the marker {bewerbung} in the subject field is also not set with the choosen value from the form...