You cannot correct them, it is reporting two emails has (probably) not be sent. The reports addon lists those addresses but usually it is not to be considered a problem if some contact cannot be reached or if the mail server has refused to send some emails. Of course if the percentages of error is important, it is required to understand what’s happening.
You can even enable the logger on main setting to have information reported on log files.
a client of mine has the same issue. It’s 554 (!) errors. What can I do?
Where can I look up the adresses the reports add on is listing? I couldn’t find anything
and don’t know what to do 🙁 Please help!