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 ma
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, a
connector. # Change the database attribute to 640 in chmod 640/etc/sasldb2 connector.
KO drop sendmail service and set postfix to default MTA
Because Postfix is used as the SMTP server, we don't want to use sendmail any more, so we don't need to stop using sendmail.
#/Etc/
like Ctrl + D above.6) quit
II. Understanding relay: Relay indicates that the SMTP server is a node on the SMTP server link. But not the final node. The relay node is retransmitted, but the final node is not transferred.
3. Error scenario: Sometimes an email can be received or cannot be received.It is reasonable to say that multiple servers corresponding to the Web application will be locally retransmitted to adm01c. However, it is found that some newly added web application servers do not writ
Postfix conflicts with sendmail. postfixsendmail
After sendmail is configured on the Linux Server (CentOS release 6.6), a problem is found during the test of sending the mail. Check the sendmail service status and find that it is in "sendmail dead but subsys locked ", check
Although said SendMail use is good, but for some reason I still like a fast and convenient mail sending server, very honored I found postfix, so I resolutely unloaded my dear SendMail used Postfix, remember the installation process as follows.Install Postfix
There is an ess
In LINUX, sending emails via external SMTP (directly abandoning sendmail and postfix). as for how troublesome the sentmail and postfix configurations are, the old man will not talk nonsense here... it takes N hours for the old man to complete the configuration... the following method can completely get rid of this...
In LINUX, sending emails via external SMTP (di
Configure cacti mail alarm, postfix and sendmail conflict environment: centos6.2, cacti0.8.8.a, net-snmp5.51, get cacti mail alarm today, just started sendmail failed, always prompt: sendmaildeadbutsubsyslockedsm-client (pid... configure cacti mail alarm, postfix and sendmail
Hiding the flag (software name and version number) will improve security and, if possible, use a mail server other than SendMail because SendMail runs as root, making it easier to raise the hacker to root.
Sendmail
Look for SendMail's configuration file and edit:
Code:Locate SENDMAIL.CFNano-w/path/to/sendmail.cf
Modify the bold portion of t
Linux uses postfix instead of SendMail to send mail
If you need to build a mail server, the use of postfix is a good choice, installation configuration is simple and efficient.
When installing, follow the instructions to select the corresponding service type, and fill in the corresponding server mailbox.
Background:In the project before the use of
Idea of Sendmail + Postfix:
1. They all belong to different SMTP Server implementations.
2. Use the resend mechanism of Sendmail to applyProgramSendmail sent to the local machine will certainly not be lost, and the local machine can connect to the remote Postfix to ensure the use of the resend mechanism. If you direc
according to different software. Only the cooperation of each software can achieve the goal of sending and receiving mails freely. Next we will introduce them separately.
1. Configure virtual users with postfix
To support virtual users, there are many configuration files to be modified for postfix.
1.1
Modify the main. cf file
First, modify the main configuration file main. cf of the
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
same email may repeat into the Postfix system once and re-deliver it.
1) emails from the server
The cooperation between various Postfix components relies entirely on the Queue to exchange mails, And the Postfix system has multiple queues. All these queues are managed by the Queue Manager. The Postfix component can del
specified by this parameter until the postfix explicitly puts forward the Delivery request. Here is an example:There is a small LAN where users send emails to a postfix email server inside the LAN, and then send the emails by dialing on the server. In this case, we can specify the value of this parameter as follows:Defer_transports = smtpThis statement indicates that p
.
* Local_destination_concurrency_limit: controls the maximum number of mails simultaneously delivered to the same local recipient. The default value is 2. Because the shipping operation can only be performed one by one when the same local recipient delivers the mail, it is useless to set it to a large one.
3. Limit the number of recipients of the same Email
Use the default_destination_recipient_limit parameter to control the Postfix shipping proxy (s
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 throu
I. Principles of mail serviceThe mail service is one of the most commonly used services in our daily life. In the old release version, the default mail service is sendmail, and the default sending service is postfix in versions later than centos6. You also need to configure mx records through third-party DNS or internal DNS before configuring postfix. Before furt
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