MailScanner functionality

[Peter Russell]

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http://www.fsl.com/whitepapers/Fortress_SMGateway_Architecture_Diagram.pdf

Steve has documented the procees above.

Checkoutthe FAQ, MAQ and Wiki on the www.mailscanner.info

To achieve what you want postfix can be configured to accept mail only 
for valid users. In the wiki there are some pointers to using recipient 
lists (which you can create manually for the small environment you have) 
which are essentially lists of usernames or emails that postfix will 
accept emails for, if the email is addressed to some one not in the 
list, it will be rejected.

Pete


Tom Carroll wrote:
> Alright, I suppose I can ask my questions here since this is where the
> experts are.
> 
> I am curious as to the function chain of MailScanner.
> 
> Here's my optional MTA and mail handling system, and I do not know if
> MailScanner can work in this way or not (I have read the docs).
> 
> SMTP session begins.
> SMTP server checks ip for open relays.
>    If open relay = true
>       SMTP server rejects mail from open relay
> SMTP server checks for local user
>    If local user = false
>       SMTP server rejects message for non-local user
> SMTP server checks for acceptance of mail from ip or tld
>    If ip or tld on reject list = true
>       SMTP server rejects message with message of how to reach postmaster
> SMTP server accepts message
>    Process for spam
>       If message = spam
>          Process in accordance with rules
>    Process for virus
>       If virus = true
>          Process in accordance with rules
>    Deliver message
> 
> I run my own mail server with my own domain through dyndns.  I have two
> pre-teen children who have begun playing online games and chatting with
> friends.  I see the number of spam messages increasing and I want to put a
> stop to the majority of the risk of having the system accepting dangerous
> e-mails.
> 
> Since this is my server and I am only serving to my family, I want to block
> certain tld's from sending mail to us.  I know the political backlash I can
> get for stating this, but this system is private, therefore I do not have to
> accept something if I do not want it.
> 
> Can mailscanner do this for me?  I believe PostFix can, but it appears my
> server is currently accepting everything that is sent to it, processing it
> and then sending out a bounce message.  I do not want to receive anything on
> my server until I determine it is something I want.  I do not know if
> MailScanner is able to be the sentry at the front door that I need.  To me
> it appears it is the sentry in the lobby rejecting the unwanted after it has
> already entered the lobby.  Bad for security...
> 
> Thank you!
> 
> Tom
> 
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> 

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Support MailScanner development - buy the book off the website!