Fake Reply and sender address - looping receive mail in mailscanner

[Hugo van der Kooij]

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Ronald Ong wrote:

| It seems Spammers are sending spams to different mail servers using our
| domain as REPLY address. All users in the reply address
| (ourusers-fake at ourdomain)  are fake . RECIPIENT address also
| non-existent. Both servers are looping and bouncing mail notification.
|
| Recipient  anti-spam server will send a notification email to our server
| (using the fake reply) saying that it cannot deliver.
| Since REPLY address are fake , MAILSCANNER will send out bounce
| notification.

MailScanner can not send out bounces. It is your MTA that does so.
However since these messages are bounces your MTA is in violation of
standards if it sends out bounces upon such messages.

If your MTA accepts email to non-existing email addresses then that is
the problem you need to fix. In any given configuration your first MTA
should be able to tell good recipients from bad ones and never accept
email for non-existing addresses.

The solution is dependent upon your total email setup and the MTA used
along with MailScanner. Barring any details about your MTA or email
topology it is not possible to give you any further details towards a
solution.

Hugo.

- --
hvdkooij at vanderkooij.org               http://hugo.vanderkooij.org/
PGP/GPG? Use: http://hugo.vanderkooij.org/0x58F19981.asc

	A: Yes.
	>Q: Are you sure?
	>>A: Because it reverses the logical flow of conversation.
	>>>Q: Why is top posting frowned upon?

Bored? Click on http://spamornot.org/ and rate those images.

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