Hello,

Is that possible, would that tell us anything?

This isn't a good idea. The mail function itself works because you can confirmed that the contact-form works and you received notification mails etc. From a techniquel point of view, I cannot reproduce your issue.

If you like to test an older version of the forum, you should install the complete version (e.g. parallel to your existing system). But you should not mixing files from different versions.

/Micha