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http://www.postfix.org/DEBUG_README.html
Postfix version 2.1 and later can produce mail delivery reports for debugging purposes. These reports not only show sender/recipient addresses after address rewriting and alias expansion or forwarding, they also show information about delivery to mailbox, delivery to non-Postfix command, responses from remote SMTP servers, and so on.
https://easyengine.io/tutorials/mail/postfix-debugging/
Oct 14, 2013 · Debugging Postfix Config, Mail Logs & more Note: Please check common mistakes with mail server first. You will need to debug postfix, when you are facing email related issues like emails are not sent, emails are delivered but with a long delay, mail bounces, etc.
https://access.redhat.com/solutions/70539
How to enable debug mode of postfix. Resolution. You can do it as following approach; to debug connection from specific host, you can configure it on main.cf file with debug_peer_level and debug_peer_list: For example; debug_peer_level = 10 debug_peer_list = 127.0.0.1 …
http://web.mit.edu/netbsd/src/gnu/dist/postfix/proto/DEBUG_README.html
Mail Delivery Status Report will be mailed to <your login name>. These reports contain information that is generated by Postfix delivery agents. Since these run as daemon processes and do not interact with users directly, the result is sent as mail to the sender of the test message.
https://discourse.ubuntu.com/t/mail-postfix/11325
Jan 20, 2020 · sudo systemctl reload postfix.service Logging mail delivery. If you are having trouble sending or receiving mail from a specific domain you can add the domain to the debug_peer_list parameter. sudo postconf -e 'debug_peer_list = problem.domain' sudo systemctl reload postfix.service Increasing daemon verbosity
http://www.postfix.org/postconf.5.html
Report mail delivery errors to the address specified with the non-standard Errors-To: message header, instead of the envelope sender address (this feature is removed with Postfix version 2.2, is turned off by default with Postfix version 2.1, and is always turned on with older Postfix versions). enable_idna2003_compatibility (default: no)
https://ubuntu.com/server/docs/mail-postfix
sudo systemctl reload postfix.service Logging mail delivery. If you are having trouble sending or receiving mail from a specific domain you can add the domain to the debug_peer_list parameter. sudo postconf -e 'debug_peer_list = problem.domain' sudo systemctl reload …
https://help.ubuntu.com/lts/serverguide/postfix.html
Postfix is the default Mail Transfer Agent (MTA) in Ubuntu. It attempts to be fast and easy to administer and secure. It is compatible with the MTA sendmail.This section explains how to install and configure postfix.It also explains how to set it up as an SMTP server using a …
https://www.linode.com/docs/email/postfix/troubleshooting-problems-with-postfix-dovecot-and-mysql/
Oct 31, 2019 · This guide is a companion to the Postfix, Dovecot, and MySQL installation guide. Because setting up a mail server is tricky, we’ve created this companion troubleshooting guide to help you work through and resolve any problems you might be experiencing.
https://docs.iredmail.org/debug.postfix.html
Turn on debug mode in Postfix. There're few ways to turn on debug mode in Postfix, you can choose the one you prefer. Verbose logging for specific SMTP connections. To debug smtp connection from particular client or sender server, list client hostname or IP address in the debug_peer_list parameter (in /etc/postfix/main.cf). For example:
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