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https://serverfault.com/questions/920150/how-to-disable-sender-non-delivery-notification-in-postfix
It is strongly suggested that you do not disable NDR responses on any mail server. However, it is possible to disable NDR responses in Postfix if you would like to. 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 …
https://talk.plesk.com/threads/configure-postfix-bounce-notification-recipient.341062/
Nov 23, 2019 · The message to gmail bounces, and then it looks like Postfix tries to send the non-delivery notification to "[email protected]".I have mail disabled for all of my virtual hosts; they do not accept incoming mail, and in any case no such …
https://www.linuxquestions.org/questions/linux-software-2/opensuse-postfix-error-sender-non-delivery-notification-email-bounced-4175469011/
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http://postfix.1071664.n5.nabble.com/Don-t-send-quot-sender-non-delivery-notification-quot-to-one-sender-td94736.html
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. >> >> I have set notify_classes= to not receive any e-mails about errors/bounces but it looks like the non-delivery notifications still occur.
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. An example:
http://www.postfix.org/DSN_README.html
Normally, Postfix informs the sender only when mail delivery is delayed or when delivery fails. What content is returned in case of failure: only the message headers, or the full message. An envelope ID that is returned as part of delivery status notifications. This …
http://www.postfix.org/postconf.5.html
This service maintains a record of failed delivery attempts and generates non-delivery notifications. This feature is available in Postfix 2.0 and later. bounce_size_limit (default: 50000) The maximal amount of original message text that is sent in a non-delivery notification. Specify a byte count.
https://www.payetteforward.com/disable-local-email-delivery-postfix-iredmail/
Basically, all of postfix’s main configuration settings are in main.cf, so you can open the file by typing vim / etc / postfix / main. cf . Look for the virtual_mailbox_domains line — comment it out by putting a # before it. That’s going to disable local email delivery altogether.
http://www.postfix.org/BACKSCATTER_README.html
If your machine receives backscatter mail to random addresses, configure Postfix to reject all mail for non-existent recipients as described in the LOCAL_RECIPIENT_README and STANDARD_CONFIGURATION_README documentation. If your machine runs Postfix 2.0 and earlier, disable the "pause before reject" feature in the SMTP server.
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