strange error message in my mail logs

[Craig White]

Can anyone explain this (this is an installation that has been updated
several times)

Nov 15 20:09:59 srv MailScanner[17444]: New Batch: Scanning 1 messages,
3619
bytes                                                                         
Nov 15 20:09:59 srv MailScanner[17444]: Virus and Content Scanning:
Starting                                                                               
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--unzip                                                                        
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--jar                                                                          
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--tar                                                                          
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--tgz                                                                          
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--deb                                                                          
Nov 15 20:09:59 srv MailScanner[17444]: WARNING: Ignoring deprecated
option
--unrar                                                                        

Thanks

Craig