FaxMaker allows failed faxes to be resent and the number of retries and the amount of time between each retry to be configurable. This article provides more information about how these faxes are logged in the sendlog.fmlogger.txt.
If a fax fails and is retried and is successful, the sendlog.fmlogger.txt (default location C:\Program Files(x86)\GFI\FaxMaker\logs) will only show the successful fax in the log. It will show in the call duration, the total time for all of the faxes, failure(s) included.
At this time, there are no alerts that are available to note if queued faxes are exceeding a certain number or if a specific fax has been in the queue for a long time.