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http://www.postfix.org/TUNING_README.html
Tuning the frequency of deferred mail delivery attempts. When a Postfix delivery agent (smtp(8), local(8), etc.) is unable to deliver a message it may blame the message itself, or it may blame the receiving party.
https://linux.die.net/man/8/pipe
The pipe(8) daemon processes requests from the Postfix queue manager to deliver messages to external commands.This program expects to be run from the master(8) process manager.. Message attributes such as sender address, recipient address and next-hop host name can be specified as command-line macros that are expanded before the external command is executed.
https://blog.mailtrap.io/postfix-sendmail-exim/
Oct 28, 2019 · You’re OK with the routing logic but are willing to pump up the performance using either Postfix, Exim or both. What you can do is use Postfix as the first level of anti-spam/malware for receiving mail from the Internet. Exim can be used for site-specific processing or local mail delivery.
https://kifarunix.com/configure-postfix-to-use-gmail-smtp-on-ubuntu-18-04/
In this guide, we are going to learn how to configure Postfix to use Gmail SMTP on Ubuntu 18.04 to relay mails. To ensure reliable mail delivery, Postfix MTA can be configured to relay mails through an external SMTP server such as Gmail SMTP server.
https://www.golinuxcloud.com/configure-postfix-mail-server-smtp-relay-rhel/
Nov 18, 2019 · Postfix is a Mail Transport Agent (MTA) responsible for the transfer of e-mails between mail servers using the SMTP protocol. In this article I will share the steps to configure postfix mail server and client using postfix SMTP relay along with some …
https://support.plesk.com/hc/en-us/articles/213931945-Mail-to-external-mail-service-is-delivered-locally-on-Plesk-server
Mail to external mail service is delivered locally on Plesk server ... it is possible to modify Postfix configuration to exclude domains which exist in Plesk from the local delivery: ... The mail service is disabled for external.com. I have checked the postfix configuration and it returns:
https://bbs.archlinux.org/viewtopic.php?id=181275
May 14, 2014 · Re: [SOLVED]Issue with Postfix sending to external mail addresses I cannot understand one thing. You have a mail server (with postfix) and you are trying to send email from your server to another mail (like eg your gmail account) and postfix is connecting back to your own server?
https://linux.die.net/man/8/local
The local(8) daemon processes delivery requests from the Postfix queue manager to deliver mail to local recipients.Each delivery request specifies a queue file, a sender address, a domain or host to deliver to, and one or more recipients. This program expects to be run from the master(8) process manager.. The local(8) daemon updates queue files and marks recipients as finished, or it informs ...
https://community.spiceworks.com/topic/2257426-exchange-2016-with-postfix-relay-will-not-send-mail-to-external-addresses
Feb 14, 2020 · I've got an Exchange server that is supposed to be sending mail through a Postfix relay to external domains. The issue is that it doesn't. Internal address are no issue, only external ones present a problem. Every time an external address is to be contacted, the following messages show up in delivery reports: Submitted. 2/12/2020 8:57 PM EXCHANGE
https://www.linux.org/docs/man8/pipe.html
To prevent Postfix from sending multiple recipients per delivery request, specify transport_destination_recipient_limit = 1 in the Postfix main.cf file, where transport is the name in the first column of the Postfix master.cf entry for the pipe-based delivery transport.
https://www.mankier.com/8/pipe
pipe man page. pipe — Postfix delivery to external command Synopsis pipe [generic Postfix daemon options] command_attributes... Description. The pipe(8) daemon processes requests from the Postfix queue manager to deliver messages to external commands.This program expects to be run from the master(8) process manager.. Message attributes such as sender address, recipient address and next …
https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-16-04
Apr 29, 2016 · Introduction. Postfix is a mail transfer agent (MTA), an application used to send and receive email. In this tutorial, we will install and configure Postfix so that it can be used to send emails by local applications only — that is, those installed on the same server that Postfix …
http://www.postfix.org/transport.5.html
The transport field specifies a mail delivery transport such as smtp or local. The nexthop field specifies where and how to deliver mail. The transport field specifies the name of a mail delivery transport (the first name of a mail delivery service entry in the Postfix mas-ter.cf file). The nexthop field usually specifies one recipient domain ...
https://en.wikipedia.org/wiki/Master.cf
Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail.. It is released under the IBM Public License 1.0 which is a free software license.Alternatively, starting with version 3.2.5, it is available under the Eclipse Public License 2.0 at the user's option.. Originally written in 1997 by Wietse Venema at the IBM Thomas J. Watson Research Center in ...
https://fasthandle.net/middleware/postfix/conf001.html
In # particular, don't specify nobody or daemon. PLEASE USE A DEDICATED # USER. # mail_owner = postfix # The default_privs parameter specifies the default rights used by # the local delivery agent for delivery to external file or command. # These rights are used in the absence of a recipient user context.
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