Deleting all messages

is it possible to delete all old messages in one time?
my phplist version is 2.10.18

Hi, not sure phpList 2 is now very old and not very secure either. You need to upgrade.

thanks Anna for your time, if i upgrade my version, there are the possibilities for deleting all sent messages?

I think you can delete them one by one, but perhaps you should just have a fresh install? If you delete the messages you lose all the data associated with them, like clicks and opens etc. So, if you are sure you want to delete them then it might be simpler to just start again with a new install or account and move your subscribers over.