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User xxx@mydomain.com not listed in Public and Address book

How can I set my server not to send a reply message to sender with that error message?

Yesterday my server collapsed because too many messages to reply to fake senders.
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Enrique040897
Asked:
Enrique040897
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1 Solution
 
rvthostCommented:
You're trying to disable the Delivery Failure notices to the sender?
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Sjef BosmanGroupware ConsultantCommented:
Would that be in the Admin Help database, under Setting advanced transfer and delivery controls?

It's in the Configuration document for the server, Router/SMTP - Advanced - Controls, Advanced Transfer Controls section, Hold undeliverable mail:

Enabled - When the Router cannot transfer or deliver a message, it leaves the message in MAIL.BOX rather than generate a delivery failure report. Select this option if you want to be able to examine messages with failures. You can then access these messages and either release them, forward them, or delete them

Disabled - (default) When the Router cannot deliver a message, it generates a delivery failure report.
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rvthostCommented:
Enrique - I think Sjef may be correct.

My comment, and I don't know how big your company is to review every message, is to look at the bigger picture.  I would think that you wouldn't want to eliminate and/or review delivery failure messages.  Even if you disable them, what happens when someone incorrectly types an email address and never receives a delivery failure message?  Spam is a problem, and that's what you're running into.  I would look into some spam filtering solutions.  There are solutions that can do an LDAP sync with your Domino directory to determine if the address exists.  This would offload the delivery failure traffic from your mail server.  Also, have you looked into blacklists, etc.?  I think it's better to filter what you can, rather than just dropping your mail messages.  If you drop messages, it could make email even more unreliable than what it already is.  We reverted from an internally hosted spam solution to an outsourced spam filtering solution about a year ago, and the reduced traffic is quit amazing.  Food for thought :)
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Sjef BosmanGroupware ConsultantCommented:
I fully agree. Sifting through wrongly addressed mail can be a burden when there is a lot of it.
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Enrique040897Author Commented:
I agree with both of you.  

Message vs. delivery report?  I do prefer the delivery report, which is the current case.  The point is that during the last two weeks it seems like a Denial of Service attack.  

For what I see, with Lotus Domino server 6.5.5, I cannot set a parameter to stop this.  And your suggestion is to outsource spam filtering solution. right?
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Sjef BosmanGroupware ConsultantCommented:
Hm, I'd set it to not to produce the Non-Delivery Reports, so your system will act like a Black Hole :) Any spam-filter would do the same, although they might send honest people an honest NDR...

Btw, any spam filter will do, even those in Domino.  
    http://www.openntf.org/Projects/pmt.nsf/ProjectHome?ReadForm&Query=kspam
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Sjef BosmanGroupware ConsultantCommented:
Thanks :) You could have split the points, the spam-idea is rvthost's
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rvthostCommented:
No problem, thanks though Sjef :)
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Enrique040897Author Commented:
how?   the system only allows me to select one comment as an answer. I don't know if there is time.
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Sjef BosmanGroupware ConsultantCommented:
The option to split points is somewhat hidden, at the bottom of the question. When you click it, a new page shows up with only the answers (no posts from you). See the help somewhere how to do this exactly.
    http://www.experts-exchange.com/help.jsp
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