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In our development environment I redirect mails following some specific rules. I am quite sure that I achieved that in the past with hook__civicrm_alterMailParams where I changed the $params['toEmail'] to whatever email suited. Additionally I changed $params['text']to have some info about the original email address.

Now this logic starts to fail after upgrading from CiviCRM 5.50.0 to 5.50.2 (when you send a mail to an individual contact from the contact view page). The reason is that $params['toEmail] has now the value NULL instead of a string with the email address. For sending mass mailings this logic still works - for every single email the hook is called with an $params array with 'toEmail' set.

The release notes from 5.50.1 and 5.50.2 did not show any code changes that seem to be related to that. How can I find someone to check that? It seems to be a main issue to me when changes like that are made in core without any information.

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The hook_civicrm_alterMailParams(&$params, $context) hook is called twice

  1. $context == 'messageTemplate' -> When building the message, at this moment the toEmail is not set
  2. $context == 'singleEmail' -> called when email is build and about to send.

HTH

Pradeep

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    Thank you so much... I simply forgot about that and made a change in my own code that did not respect that fact. Sorry for the noise!
    – Tobias Krause
    Commented Jun 22, 2022 at 13:59

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