Display statistics of incoming mail
The mailstat command is used to display the status and statistics of incoming mail, typically based on log files generated by tools like procmail.
mailstat [OPTION]... [LOGFILE]
-k：Keep the mail log file intact; do not truncate it after reading.
-l：Use long format to display mail status.
-m：Merge any error messages into a single line for display.
-o：Use the old mail log file.
-t：Use a concise format to display mail status.
-s：Silent mode; do not output any information if there is no mail.
Log File: The path to the mail log file to be read.