postfix troubleshooting

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Postfix skills and troubleshooting commands

Postfix skills and troubleshooting commands Here are some commands I use every day. Of course, other email administrators will also use them, so I will write them down in case I forget them. LIST/print the current Message Queue # Postqueue-p # Mailq If the queue is too long, you can use the tail pipeline to read it. # Mailq | tail Clear queue # Postqueue-f Immediately post all emails for a doma

Troubleshooting of mail failures caused by Postfix failures

The last day, I received a lot of feedback from users, reflecting that emails from several websites could not be received normally. Initially, it was caused by the stress test of the mail system. after notifying the O M personnel to perform system monitoring, it was found that tens of thousands of emails were blocked in the mail service queue. After a detailed investigation, it was found that mailtoken, the built-in security software of Postfix, ha

Rotten mud: virtual user configuration of Postfix mail server, postfix Mail Server

Rotten mud: virtual user configuration of Postfix mail server, postfix Mail Server This document consistsIlanniwebProviding friendship sponsorship, first launchedThe world For more articles, follow my ilanniweb In the previous article "mud: software installation and configuration for building a Postfix Mail Server", we introduced the software required for build

Postfix installation and configuration tutorial postfix Overview

Postfix is the MTA mail transmission agent developed by Wietse Venema under the ibm gpl protocol. The following section is taken from postfix's official site http://www.postfix.org ):"Postfix is an attempt by Wietse Venema to provide alternatives to the most widely used sendmail. In the Internet world, most emails are delivered through sendmail. About 1 million users use sendmail to deliver hundreds of mill

Postfix mailbox (iv): Install CYRUS-SASL enable postfix to support SMTP authentication

Note: Postfix SMTP authentication needs to be connected to Authdaemon to obtain authentication information through CYRUS-SASL;The limitations and filtering capabilities of Postfix are explained later in this section.First, installation configuration CYRUS-SASL1, the system has been installed by default CYRUS-SASL:[Email protected] ~]# Rpm-aq|grep cyrus-saslcyrus-sasl-gssapi-2.1.23-13.el6_3.1.x86_ 64cyrus-sa

Postfix Basic Installation (ii): Install Postfix backstage

-2.6.6-2.2.el6_1.x86_64#centos6.5 has been installed by default version 2.6.6, then upgrade: [Email Protected] ~]# Yum update postfixpostfix-2.6.6-6.el6_5.x86_64CentOS 7 has a built-in version of 2.10.1, and for the time being no research has been done to improve it, and will release 7 builds in the future.2. Configuration[[emailprotected]~]#cd/etc/postfix[[emailprotected]postfix]#postconf -n>/etc/

Postfix Mail Server construction, postfix Mail Server

Postfix Mail Server construction, postfix Mail Server EnvironmentCentos 6.4 64-bit SystemThe service is a system account used to send and receive emails.Before configuring DNS resolution for the server, add A, MX, and TXT tags. Take hichina as an example. Record type host record resolution line record value MX priority TTLA mail default line 192.168.1.2 -- 10 minutesMX @ default line www.abc.com. 10 10 minu

Mail alarm (postfix), mail alarm postfix

Mail alarm (postfix), mail alarm postfix Postfix is the MTA software developed by Wietse Venema under the ibm gpl protocol. Postfix is an attempt by Wietse Venema to provide alternatives to the most widely used sendmail. In the Internet world, most emails are delivered through sendmail. About 1 million users use sendma

Postfix-webmail installation, postfix-webmail

Postfix-webmail installation, postfix-webmail Extmail is a WebMail program with powerful functions. This article introduces a more user-friendly WebMail program roundcube. 1. Download and install roundcube cd /server/tools/wget http://jaist.dl.sourceforge.net/project/roundcubemail/roundcubemail/1.1.4/roundcubemail-1.1.4-complete.tar.gztar -xf roundcubemail-1.1.4-complete.tar.gzmv roundcubemail-1.1.4 /var/ww

RHEL 4.1 + courier-imap + Postfix + MySQL + extmail + extman

Configuration process1. Install basic softwareInstall RHEL 4 u1, disable se Linux, and install the "built-in system" software, including:Web servers: AllEmail server: AllMySQL database: All.Development Kit: development tools; KDE software development; Legacy Software delelopment; xsoftware DevelopmentDownload other required software:Courier-authlib-0.58.tar.bz2 google.cnCourier-imap-4.0.6.tar.bz2 google.cnExtmail-1.0.3.tar.gz www.extmail.orgExtman-0120012.161_12.16.2.3.tar.gzPostfix-2.5.0.tar.gz

Detailed description of configuration parameters for recommended Postfix

4.1postfix configuration file structure the postfix configuration file is located in etcpostfix. After installing the postfix, we can run the ls command to view the postfix configuration file: [root @ mailpostfix] # lsinstall. cfmain. cfmaster. cfpostfix-script: these four files are the most basic configuration files of postf

Postfix local delivery and POP/IMAP

The SMTP protocol requires that the MTA that receives the mail be responsible for sending the mail to the final destination, which may be the mailbox of the local system or other hosts on the same network, this process is called delivery ). This chapter discusses the process of posting a local email to a mailbox using Postfix and how POP/IMAP Serer can access the mailbox. Many users often mistakenly think that the same set of software is used for rece

Postfix configuration details

. 1 Postfix configuration file structure The Postfix configuration file is located in/etc/Postfix. After the Postfix is installed, you can run the LS command to view the Postfix configuration file: [Root @ mail Postfix] # ls Insta

Linux Mail Server Postfix, qmaill, and Sendmail Competitions

Linux Mail Server Postfix, qmaill, and Sendmail competition-Linux Enterprise Application-Linux server application information. For details, see the following. A few years ago, only Sendmail was available for free mail servers in Linux. However, due to the Sendmail defect, some developers have developed several other mail server software. Currently, the free email server running in Linux, or the MTA (Mail Transfer Agent), has several options: Sendmail,

Principles and configurations of the Postfix Mail Service System

Working Principle and related concepts of POSTFIX Postfix internal email receiving and sending Flowchart The entire process is divided into three stages: receiving emails, queuing emails, and delivering emails. A group of independent Postfix components is responsible for each stage. After an email is received and entered into the Queue, the Queue Manager starts

Postfix SASL authentication

The basic SMTP protocol does not have the ability to verify user identity. Although the sender address on the envelope already implies the sender's identity, because the envelope address is too easy to fake, it cannot be used as identity creden. To determine whether the client has the right to use the relay service, the server must confirm whether the client (sender) is the person claimed by the other party. Before sending a mail address as an ID card, SMTP must require other supplementary mecha

Postfix error message Summary

Postfix _ make: *** [xsasl_cyrus_server.o] Error 1 make: *** [update] // If a compilation error occurs, check the error. Generally, the package is not installed, if it is not a parameter path error, [comment]: xsasl_cyrus_server.c: 598: Error: 'sasl _ OK 'undeclared (first use in this function) xsasl_cyrus_server.c: 600: Warning: format '% s' expects type 'Char *', but argument 3 has type 'int' xsasl _ cyrus_server.c: 603: Error: 'xsasl _ cyrus_server

Linux (CentOS6.5) postfix Server compilation installation

Basic knowledge:compiling manually environment variables used in postfix, variable values contain space or shell special characters, and the entire variable value must be enclosed in double quotation marks.AuxlibsPoint out a function library that is located outside the standard location, using this variable to mark the path of the function library;CcPointing out the specific compiler you need to use, Postfix

Postfix Transport Layer Security Protocol (TLS)

. Postfix and TLS Postfix supports TLS. It is provided by a set of patch files written by Lutz janicke. This set of patch files can be obtained from the add-on software link on the Postfix homepage. If you use the pre-compiled Postfix package that is included with the platform, make sure that this version does contain

Linux Mail Server Postfix, qmaill, and Sendmail Competitions

A few years ago, only Sendmail was available for free mail servers in Linux. However, due to the Sendmail defect, some developers have developed several other mail server software. Currently, the free email server running in Linux, or the MTA (mail transfer agent), has several options: Sendmail, Qmail, Postfix, Exim, and zmailer. This article will describe the characteristics of MTA in mainstream Linux environments with relatively large impact, and an

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