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https://serverfault.com/questions/920150/how-to-disable-sender-non-delivery-notification-in-postfix
Let me explain. Your urge to disable Non-Delivery Notifications (NDN) aka bounces messages probably arises from a good intent to avoid sending backscatter. Still, you need to be able to inform your own users if they are sending mail to email addresses with problems.
https://www.howtoforge.com/community/threads/postfix-send-sender-non-delivery-notification-for-not-existing-domain-alias-account.70707/
Aug 05, 2015 · Normally my Postfix correctly deny not existing mailboxes and don't send such messages. But in my case the destination address aims to an domain alias and Postfix accept the message at first step and manually send a "sender non-delivery notification", because it recognize the target isn't available after he really replace the domain.
https://ubuntuforums.org/showthread.php?t=2234683
Jul 23, 2014 · Jul 16 11:12:27 batz postfix/bounce[2756]: 9F1913017EE: sender non-delivery notification: 1CE443017F3 Jul 16 11:12:27 batz postfix/qmgr[22039]: 1CE443017F3: from=<>, size=3242, nrcpt=1 (queue active) Jul 16 11:12:27 batz postfix/qmgr[22039]: 9F1913017EE: removed Jul 16 11:12:27 batz postfix/smtp[2750]: 1CE443017F3: to=<xxx@xxx>, …
https://groups.google.com/d/topic/alt.comp.mail.postfix/fsbLiyGIlkg
Jan 01, 2008 · >> 'sender non-delivery notification' > The usual reason for unexpected "non-deliverable" reports is that > somebody on the Internet has forged your address as the sender of spam > …
http://postfix.1071664.n5.nabble.com/Don-t-send-quot-sender-non-delivery-notification-quot-to-one-sender-td94736.html
Don't send "sender non-delivery notification" to one sender Is it possible to exempt one sender from receiving non-delivery notifications? We have a DMARC policy that forces DKIM headers on all mail and when Postfix sends a non-delivery notification to this bulk mail sender (a fake e-mail alias) it fails because of our DMARC policy.
https://www.linuxquestions.org/questions/linux-software-2/opensuse-postfix-error-sender-non-delivery-notification-email-bounced-4175469011/
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https://www.lifewire.com/ignore-delivery-failures-of-unsent-messages-1174019
Nov 14, 2019 · Ignore Delivery Failures of Messages You Did Not Send Now, what happens if a spammer or a virus decides to put your email address in the From: line can be annoying, disturbing or disastrous. If the messages claiming delivery failures of messages you did not write (sometimes, these bounces of messages you did not send are called "backscatter") don't come in the thousands, it is …Author: Heinz Tschabitscher
https://www.digitalocean.com/community/questions/postfix-send-email-but-it-s-not-received
Sep 17, 2014 · Postfix send email but it's not received. Posted September 17, 2014 37.5k ... nrcpt=1 (queue active) Sep 17 13:09:01 objavi-net postfix/bounce[8714]: 36AC012009A: sender non-delivery notification: A389D12161E Sep 17 13:09:01 objavi-net postfix/qmgr[7512]: 36AC012009A: removed Sep 17 13:09:01 objavi-net postfix/smtp[8713]: A389D12161E: to=<root ...
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