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Stop Virtual Email Appliance from sending NDRs?

Hi there,

I'm running two SEAs in a cluster, version 3.7.7.1.

Our queued mail indicator constantly indicates a high amount of messages, due to deferred messages being sent by the SEA's mail daemon:

This is the mail system at host sbaspammer01.***.org.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<usernameremoved>: host 10.189.203.48[10.189.203.48] said: 554 5.1.0
Sender denied (in reply to end of DATA command)

This is a result of the originating sender's IP being found on DNSBLs we are utilizing within Exchange.

We have Exchange configured not to send NDRs....but is there any way to keep the SEAs from sending NDRs?

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0 adhodgson over 11 years ago

Hi,
In my view you should be doing RBL filtering on the email appliance and not in Exchange. You need to reject the message as early as possible, so you don't end up accepting the message, then rejecting it once it gets to Exchange, which will fill up your outbound queue with NDRs which are undeliverable.
Thanks. Andrew.
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0 adhodgson over 11 years ago

Hi,
In my view you should be doing RBL filtering on the email appliance and not in Exchange. You need to reject the message as early as possible, so you don't end up accepting the message, then rejecting it once it gets to Exchange, which will fill up your outbound queue with NDRs which are undeliverable.
Thanks. Andrew.
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