Greetings, Thomas. On 9 декабря 2006 г., 1:07:11 you wrote:
> Hi, > I'm using qmail toaster as a email gateway for our exchange server. If a > spammer sends a mail to a not existing email address on our domain the > mail is forwarded to the exchange server. The exchange server generates > a ndr and send it to the fake sender address. Is it possible to let > qmail check if the recipient exist on the exchange server or in a list > or something else before it accept the mail. It is possible, but you'll have to implement yourself a path for qmail-smtpd which will query exchange server for existence of user. As an alternative, you can implement qq handler proxy, that will accomplish this task (just like qmail-dk does this for DomainKeys). Another alternative is to fetch from http://qmail.org any patch that enables to check SMTP recipient address against CDB with pre-created user-list, and to write a script that will re-create this CDB list hourly, basing on information from Excange server. In any case you'll need to do some extra work, like programming and patching. AFAIK, there is no complete and ready-to-user solution to suit your needs ATM. -- Best regards, Alexey Loukianov mailto:[EMAIL PROTECTED] System Engineer, IT Department, Lavtech Corp --------------------------------------------------------------------- QmailToaster hosted by: VR Hosted <http://www.vr.org> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
