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https://www.howtoforge.com/community/threads/postfix-send-sender-non-delivery-notification-for-not-existing-domain-alias-account.70707/
Aug 05, 2015 · Postfix accept message and redirect to amavis; Amavis returned and postfix rewrite domain (Log 2) Postfix regonize not existing mailbox and create "sender non-delivery notification" for an not existing source address; I know, why it is happen. Postfix don't know in case of domain alias at first step, if the mailbox exist.
https://serverfault.com/questions/920150/how-to-disable-sender-non-delivery-notification-in-postfix
I understand that changing the following line to read "discard" instead of "bounce" in master.cf will prevent non-delivery notifications, but I'm wondering if it's possible to take it a step further and only disable non-delivery notifications originating from emails that have been blacklisted through a sender access list which is called through smtpd_recipient_restrictions in main.cf.
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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https://www.linuxquestions.org/questions/linux-server-73/postfix-relay-won%27t-send-non-delivery-notifications-922816/
Jan 11, 2012 · The company mail server is running postfix. This setup is working so far, e-mails sent by our OpenEMM server are relayed and delivered to the final recepient - No problem here. However, for non-existing recepients, postfix will not send any non-delivery notification back to sendmail - …
https://www.digitalocean.com/community/questions/postfix-send-email-but-it-s-not-received
Sep 17, 2014 · It looks like gmail indeed did receive it. Maybe they are blacklisting your ip. Check your mail logs to see if you are getting 421 or 550 errors coming back from google.
https://devanswers.co/postfix-statusbounced-unknown-user-user/
May 24, 2017 · I was experiencing a problem sending mail to an address at my own domain. I wanted my PHP app to send notification emails to [email protected] but they kept bouncing with “status=bounced (unknown user: “user”)”. Accessing the log: sudo tail /var/log/mail.log -n 200 …5/5(11)
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 > that got bounced. This is known as back-scatter - search for that term ... to setup postfix correctly with only the official documentation, and the
http://postfix.1071664.n5.nabble.com/Don-t-send-quot-sender-non-delivery-notification-quot-to-one-sender-td94736.html
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.
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