2Q's in 1 - sendmail & proftpd

1.My server seems to have exim mail and sendmail.... (i think because vbulletin&perldesk uses sendmail)

Is it good to keep both or just 1?


1. A) How do i limit how much mail from a username/usergroup/domain can send each hour?


2. For proftpd, how do I limit how much ftp conenctions can come from 1 login at the same time?



Thanks.

 

 

 

 

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