[plug] Mail Filtering

[Ben Jensz]

Two instances of Postfix?

One running on port 25, and a second one running on port 1025:

/etc/postfix/main.cf:
     smtpd_sender_restrictions = 
        check_sender_access hash:/etc/postfix/sender_access

Filter kids email address through second one running on port 1025:

/etc/postfix/sender_access:
     kids.email.address   FILTER smtp-filter:[127.0.0.1]:1025


/etc/postfix/master.cf:

smtp-filter unix -	-	n	-	2  smtp
    -o smtp_data_done_timeout=1200
    -o disable_dns_lookups=yes

127.0.0.1:1025	inet n	-	n	-	-  smtpd
   -o content_filter=
   -o local_recipient_maps=
   -o smtpd_restriction_classes=
   -o smtpd_helo_restrictions=
   -o smtpd_client_restrictions=
   -o smtpd_sender_restrictions=
   -o smtpd_recipient_restrictions=permit_mynetworks,reject
   -o mynetworks=127.0.0.0/8
   -o strict_rfc821_envelopes=yes
   -o myhostname=localhost
# Could snoop and receive a BCC of every email they send:
   -o always_bcc=someone at somewhere.com

Would that work?  I'm sure one of the Postfix gurus lurking will point out if I'm wrong :)


/ Ben


Craig Foster wrote:

>This one's an odd request...
>
>A mate uses exchange at work, and he uses the individual mail size
>limits for user accounts. Now he would like himself to be able to send
>large files via e-mail, but limit the kids to small e-mails in and out.
>He also wants to be able to manually veto e-mails that the kids have
>sent or received that are too large, but allow (forward) those e-mails
>that are actually OK.
>
>He's laid this out as a sort of challenge. The redhat box works without
>problems, but he reckons maybe Microsoft could do a better job ...
>
>I can set the default mail size limit with Sendmail, but I'm not sure
>how to do individual mailboxes. I immediately suggested different mail
>servers (one for him, one for the kids), but he's sure linux can't do
>it. I've looked through the procmail stuff, but I've ended up more
>confused than before :)
>
>Any help or pointers would be appreciated. I don't want him to win this
>one!!!
>
>Craig Foster
>fostware at iinet.net.au with SMIME
>  
>