On Wed, Jun 15, 2005 at 10:25:13PM -0700, Mihai Costache wrote: > > > but in this way you know if the mail may be delivered or > not after you reveice the mail, if you do that at smtp > level you save bandwidth ... >
That is not 100% true. qmail-queue is capable of returning in error over the SMTP session so the sender knows if the mail was accepted or not. > > --- Bruno Negrão <[EMAIL PROTECTED]> wrote: > > > Hi Fernando, > > > > Very good idea. > > > > Have you ever thougth about adding a program to intercept > > the passing messages > > with QMAILQUEUE patch, which would query the ldap > > directory for the the user's > > mailClass attribute, and based on it, allow or deny the > > passing message? > > > > This way you wouldn't need the Postfix server. > > > > Can you understand this idea? If yes, can you see > > drawbacks on it? > > > > Regards, > > bruno > > > > > > I have exactly the same problem. I worked a solution > > by: > > > > > > 1) Installing Postfix as my frontline smtpd, bounded > > > to eth0-ip-address:25 > > > 2) Creating a openldap schema with an attribute called > > > mailClass, which can have values like: > > > interNet= receives/sends only from/to Internet > > > intraNet= receives/sends only from/to Internal mail > > > all= receives/sends from/to Internet and Internal > > mail > > > 3) Installing qmail-ldap as backstage smtpd, same > > machine > > > as Postfix, bounded to 127.0.0.1:25 > > > > > > Configuration for Postfix looks at the recipient and > > > retrieves attribute mailClass. Then, it looks at the > > > sender and proceeds accordingly, relaying the email to > > > qmail-ldap at 127.0.0.1 or returning a non-authorized > > > email message to the sender. > > > > > > If authorized, qmail-ldap receives the email and > > proceed > > > to remote or local delivery. > > > > > > Pros: Postfix can be very good at blocking SPAM, so I > > > inserted anti-spam rules in it, besides the rules > > > for filtering out non-authorized mails. > > > > > > Cons: One more smtp service to maintain. Not that > > dificult, > > > but it means using more resources, like memory, > > cpu > > > and disks. > > > > > > -- > > > Bye, > > > Fernando Maciel Souto Maior > > > [EMAIL PROTECTED] > > > http://www.araujo.com.br > > > +55+31 3270-5886 > > > LPIC/1 # 31908 > > > > > > > > > AVISO------------------------------------------------------------- > > > Esta mensagem pode conter informacao confidencial ou > > privilegiada. > > > Se voce nao for o destinatario ou a pessoa autorizada a > > receber > > > esta mensagem, nao pode usar, copiar ou divulgar as > > informacoes > > > nela contidas ou tomar qualquer acao baseada nessas > > informacoes. > > > Se voce recebeu esta mensagem por engano, favor avisar > > o remetente > > > imediatamente, respondendo o e-mail e em seguida > > apagando-o. > > > Obrigado pela cooperacao. > > > > > > > > > DISCLAIMER-------------------------------------------------------- > > > This message may contain confidential and/or privileged > > information. > > > If you are not the addressee or authorized to receive > > this for the > > > addressee, you must not use, copy, disclose or take any > > action based > > > on any information herein. If you have received this > > message in > > > error, please advise the sender immediately by replying > > to this > > > e-mail and delete this message. Thank you for your > > cooperation. > > > > > > > > > ------------------------------------------------------------------ > > > This email was sent using SquirrelMail - > > http://squirrelmail.org > > > > > > > > > > > > __________________________________ > Discover Yahoo! > Find restaurants, movies, travel and more fun for the weekend. Check it out! > http://discover.yahoo.com/weekend.html > -- :wq Claudio
