-DEBUG or -D switch gives user additional control over email sending processes by displaying internal variables so that user is able to compare actual configuration with command line switches used for troubleshooting purposes.
Also, SMTP server responses are shown, allowing to check if there are no problems with remote computer.
C:\>febootimail -SERVER smtp.server.com -FROM firstname.lastname@example.org -TO email@example.com -MSG debug SMTP from dos email -DEBUG
Note that it is possible to log debug information by adding redirection operator >> (two consecutive greater than signs) that will write command line mail screen output to file (or append to existing one). Note that the same filename for screen output and -LOG switch should not be used.
Please do not hesitate to contact our support department with any possible further questions or to solve practical issues connected with Command line email.