On Monday 07 June 2004 08:08 am, Devendra Singh wrote: > Hi, > > I am using Erwin Hoffmann's qmail-smtpd-auth-0.4.2. > > I have noticed that once authenticated a user can use [EMAIL PROTECTED] > (where server.com is a domain listed in rcpthosts) in the FROM header.
even an unauthenticated user can do this. How do you think this mailing list post will have my From: header, but an envelope sender of vchkpw-return-<somenumber>[EMAIL PROTECTED]
> Is > there any remedy.
What Problem Are You Trying To Solve?
Perhaps I was unable to explain the problem properly.
Suppose a Server is hosting the following domains:
abc.com xyz.com test.com .... ....
Now, the user [EMAIL PROTECTED] has been enabled for SMTP (not POP-Before SMTP but SMTP-AUTH using Erwin's Patch).
If the user [EMAIL PROTECTED] tries to send an email as [EMAIL PROTECTED] in FROM headers, its denied. But, if he impersonates (for say spamming) in FROM headers as [EMAIL PROTECTED] or even [EMAIL PROTECTED] his outgoing mail would go through. Isn't this a case to worry?
The example that you have talked about is totally unrelated to the above explained situation.
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