• Status: Solved
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Bounce email

Hi,

We are using here Exchange 2003 STD, with a Barracuda SPAM/Spyware Firewall 400.

When a user leave the organiztion, usually delete the account, backup and flush the mailbox and then delete exchange attribute and purge the mailbox.

However, if a client send an email to a user that left, the email does not bounce. the sender never receive anything that tells him that this email is not valid.

did someone know why ?
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lussier
Asked:
lussier
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2 Solutions
 
Justin YeungCommented:
use message checking tools and see where the message go...........

someone might have that smtp address associated with a different mailbox.
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murgroupCommented:
Barracuda does not send bounce messages by default.

Could you imaging how much traffic you would have on your Barracuda if you sent a bounce message for every spam and invalid email addresses? You would get blacklisted.

You can turn them on but I would not recommend it.
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Simon Butler (Sembee)ConsultantCommented:
NDRS at the point of delivery are no harm and all antispam solutions should do recipient validation so they get rejected at that point. It will not cause blacklisting, because it isn't back scatter. Check the device configuration for recipeint validation - LDAP normally would be used.

Simon.
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murgroupCommented:
My understanding was that it is considered back scatter. Guess I had better study up on that subject. Thanks to the correction Simon.
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Simon Butler (Sembee)ConsultantCommented:
You want to do a reject, not a bounce.
http://en.wikipedia.org/wiki/Backscatter_(email)
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