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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.
http://www.postfix.org/DSN_README.html
Postfix version 2.3 introduces support for Delivery Status Notifications as described in RFC 3464. This gives senders control over successful and failed delivery notifications. Specifically, DSN support gives an email sender the ability to specify: What notifications are sent: success, failure, delay, or none.
http://domainhostseotool.com/how-to-configure-postfix-to-stop-sending-undelivered-mail-returned-to-sender-emails-thoroughly.html
Mar 24, 2018 · Completely disabling postfix to send the “Undelivered Mail Returned to Sender” emails seems not an easy thing to do. Postfix sends this kind of notification emails in many situations such as the recipients are not found, the destination host is not found, the remote smtp server refuses to …
http://www.postfix.org/BACKSCATTER_README.html
When backscatter mail passes the "unknown recipient" barrier, there still is no need to despair. Many mail systems are kind enough to attach the message headers of the undeliverable mail in the non-delivery notification. These message headers contain information that you can use to recognize and block forged mail.
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 - And that's our problem.
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 …
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://support.plesk.com/hc/en-us/articles/115002769489-Errors-in-maillog-during-a-scheduled-task-execution-User-unknown-in-virtual-alias-table
postfix/bounce[25197]: 95742F4094D: sender non-delivery notification: 96A31F40BD1 postfix/qmgr[24214]: 96A31F40BD1: from=<>, size=24173, nrcpt=1 (queue active) where hostname.example.com - server hostname user - system user name. Scheduled tasks are configured to set notifications at Domains > example.com > Scheduled Tasks > <scheduled_task ...
https://devanswers.co/postfix-statusbounced-unknown-user-user/
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 This will return the last 200 lines of the log. Log output: /var/log/mail.log…
https://www.digitalocean.com/community/questions/postfix-send-email-but-it-s-not-received
Sep 17, 2014 · Sep 17 12:12:25 objavi-net postfix/pickup[7513]: 1488312009A: uid=1000 from=<forge@objavi-net> Sep 17 12:12:25 objavi-net postfix/cleanup[7532]: 1488312009A: message-id=<[email protected]> Sep 17 12:12:25 objavi-net postfix/qmgr[7512]: 1488312009A: from=<forge@objavi-net>, size=344, nrcpt=1 (queue active) Sep 17 12:12:25 ...
https://www.howtoforge.com/community/threads/problem-with-postfix-not-sending-out-emails-to-outside-domains.54457/
Oct 13, 2011 · Problem with Postfix not sending out emails to "outside" domains ... removed Oct 6 21:16:55 Aphrodite-Artemis postfix/bounce[8464]: EE56CCAEE4B: sender non-delivery notification: F165BCAEE4D Oct 6 21:16:55 Aphrodite-Artemis postfix/qmgr[7520]: F165BCAEE4D ... Howtoforge - Linux Howtos and Tutorials. Home Forums > Linux Forums > Server Operation ...
https://community.freepbx.org/t/email-notifications-stopped-working/37022
Sep 12 11:56:36 sterlingmutuals postfix/cleanup[15720]: E40D7E0601: [email protected] Sep 12 11:56:36 sterlingmutuals postfix/bounce[15723]: D8238E05A0: sender non-delivery notification: E40D7E0601 Sep 12 11:56:36 sterlingmutuals postfix/qmgr[25053]: E40D7E0601: from=<>, size=2327, nrcpt=1 (queue active)
https://www.howtoforge.com/configure-custom-postfix-bounce-messages
maximal_queue_lifetime: The maximal time a message is queued before it is sent back as undeliverable.. delay_warning_time: The time after which the sender receives the message headers of mail that is still queued.. The postconf -n command shows the settings that are currently configured in /etc/postfix/main.cf, whereas the postconf -d command shows the default settings that are valid …
https://forum.iredmail.org/topic12039-iredmail-support-how-to-stop-sender-delivery-status-notification.html
Nov 29, 2016 · Re: how to stop sender delivery status notification OK, i get it clear now: This success notification was requested by MUA or your user's mail client software. It's requested during SMTP session with 'notify=success' directive.
https://sourceforge.net/p/postfixadmin/discussion/676076/thread/dc872364/
Aug 04, 2016 · Copy-n-paste from forum info : This is not a general Postfix help forum - this is for the separate package PostfixAdmin which configures/maintains virtual domains & mailboxes using Postfix (plus MySQL or PostgreSQL, optionally maildrop, and Courier or Dovecot). For Postfix help you should head over to postfix.org and check out the Postfix mailing lists.
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