How can I exclude proftp authentication failure messages from logwatch?

Question

I use logwatch on my server, now I get thousands of these lines in the report email:

--------------------- pam_unix Begin ------------------------ 

 proftpd:
    Unknown Entries:
       check pass; user unknown: 339 Time(s)
       authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=::ffff:62.115.255.98 : 27 Time(s)
       authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=::ffff:188.102.152.23 : 7 Time(s)
...

I already have loglevel Low

Answer 1

edit /etc/logwatch/conf/logwatch.conf

and add

Service = "-proftpd-messages"
Service = "-pam_unix"