There seems to be problem and when I drop it into google I found a thread on this forum which point to an sasl Problem I tried to restart it but it wasn´t found and seem to be not installated. Which is strange cause it was fine when the ispconfig installation ran.
Thats not strange at all as sasl is not used in your setup, see my explanations in post #6 of this thread. If sasl would be there, then you would have a problem but the absence of sasl indicates that this part of the setup is ok. Pleae be aware that there are many different types of setups and if you follow a link for a setup that is not yours, then you will find wrong answers.
The installation notices that you posted above are not related to your problem.
Regarding your original problem, check the mail.log agaon and post the errors that you get when you search for firstname.lastname@example.org