Questions tagged [ndr]
38 questions
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Reverse DNS entry for sending secure email?
I'm having problem like the following when I tried to send to abacus@abacusevents.com:
Diagnostic information for administrators:
Generating server: mail.domain.com
abacus@abacusevents.com
mail.abacusevents.com [B]#
Senior Systems Engineer
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SBS migration: NDRs when sending email to olddomain.local addresses
Just swapped in a new SBS 2008 server today. Did not perform a migration this time (old server was a mess), but chose a completely new domain and migrated everything over manually. Went well, only snag is that replies to…
gravyface
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2 answers
550 5.1.1 relay denied NDR Error
I'm having problem with my email getting rejected like the following NDR, can anyone know or help me how to prevent this blockage please ?
From: Administrator
Sent: Monday, 1 November 2010 3:35 PM
To: System Administrator
Subject: Undeliverable:…
Senior Systems Engineer
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Exchange 2010 distribution group, NDR message not being sent to original sender, when unauthenticated option in place
We got a requirement to reject external emails sent to one distribution group (test_dl1@xyz.com) using exchange 2010 transport rule in this manner. (and send NDR to the original external sender)
We have not restricted external senders in "message…
Aravinda
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3 answers
How to delist DNSBL?
Can not send email to some email addresses that it looks like they are using Office 365. The NDR message is coming from DnsConnectorDelivery which is:
[{LRT=11/6/2020 12:11:09 PM};{LED=451 4.4.0 Primary target IP address responded with: ""421…
Tarek Salah
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Postfix - disabled notifications for 535 5.7.8 Error: blocked
I have an anti-spam system based on 'postfix'.
When someone sends an email and is blocked by a blacklist, they get feedback.
Example below:
This is the mail system at host mail.xxx.com.
I'm sorry to have to inform you that your message could not
be…
cezar
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1 answer
VERP: rewrite from header of NDR?
We provide cmail delivery for external clients from several different domains.
We rewrite the envelope sender (AKA: "SMTP MAIL FROM","Return-Path" ) using a form of VERP. Thus we receive all the late bounces and have responsibility to forward them…
Jasen
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Exchange Hybrid Intermittently giving NDRs
New year, looks like a pretty active site. My company has a Hybrid config in place that cannot be removed at the moment. Since the 22/04 we have been having problems that certain domains intermittently fail with NDR. The NDR is due to a hop…
