Configure sendmail, smtp auth with (milter/perl) on CentOS 6.4

Hi, i need a sendmail-guru who is able to configure a sendmail according to my needs. If it is not possible with sendmail I will also accept a nice perl-replacement! (BTW: I would use sendmail and Sendmail::PMilter.) I have a network with some CentOS-hosts. Thery're all using machine [login to view URL] as an outgoing mail relay by using sendmails SMART_HOST. Now I want to configure [login to view URL] for requiring SMTP_AUTH for some (not all!) hosts. E.g. [login to view URL], 1.2.3.0/25, and 6.7.8.9/32 are required to use smtp_auth for using the outgoing relay functionality (where the user/password is bound to the IP!) while hosts [login to view URL], and 1.2.4.5 are allowed without SMTP_AUTH. Outgoing mail is then given to 'next' SMART_HOST [login to view URL] (without SMTP_AUTH). 'Incoming' mail is allowed only from host [login to view URL] and [login to view URL] to [login to view URL] which gives the mail to the appr. host (all without SMTP_AUTH). Local mail (e.g. the mail sometimes cron is producing) on [login to view URL] is treated as normal: Without any restrictions, smtp auth etc.... Additional there is a check on [login to view URL]: For every incoming mail I want to be able to check the 'envelope from', the 'form', and the 'frequence'. Something like (first match hits) this: USER1_FROM_SMTP_AUTH@[login to view URL]: envelope_from:"perl_regexp" from:"perl_regexp" frequence:"10/60/300" "(^USER2_FROM_SMTP_AUTH$|^USER3_FROM_SMTP_AUTH$)"@[login to view URL]: envelope_from:"perl_regexp" from:"perl_regexp" frequence:"100/10/300" *@[login to view URL]: envelope_from:"perl_regexp" from:"perl_regexp" frequence:"5/60/300" [login to view URL]: envelope_from:"perl_regexp" from:"perl_regexp" frequence:"//" The above checks have to be done inside the accept process of the message! NOT AFTER accepting the message! The sender host will receive an appr. error when it tries to relay the message and the situation is logged into the mail-log of [login to view URL], too! You won't get access to my hosts!! Do it at your hosts, tell me which rpms I need, what I need to configure and just give me the [login to view URL] (or do I need the [login to view URL])! If you really want the job: Tell me in PM which software you will use, what kind of similar work you have done, etc.... An "I can do it!" is NOT enough!!!