I have an issue when configuring smtp alerts using my internal smtp, it has a relay to my ISP.

Sending emails from applications other than DNN works fine and emails reach their destination except when I send a test with DNN

In the smtp server log I can see that all operations are successful (authentication to my local smtp as well as successful authentification to my ISP), however, message never arrives to destination.

I opened a ticket with my ISP and he is requesting copy of the email header, how can I get copy of the test sent email? is there any place in DNN to see sent messages with their details?

Thanks in advance