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In CentOS5.564bit, postfix + dovecot + sasl2 + webmail, mail authentication, and email account usageSystem user name.
The Simple Mail Server is not a professional set up of a complete enterprise mailbox. It is not installed on mailcharts, spam, and fprot! Including mysql authentication.
Environment:
CentOS5.564bit
Enterprise Domain Name monoedu.com
Mail.monoedu.com
Mail
I used126The client is Microsoft Outlook. A problem occurred recently. The server rejects the sender's email address because the email fails to be sent,Tip: the server returns. UseFoxmailThe same is true (see). What should I do?
If a problem occurs, you must go to the Internet to find the cause and solve the probl
Article Title: Use Qmail in Linux to create a department email server. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
I. installation environment
Installation Platform: RedHat Linux 7.3
Installed machine: mail.mydomain.com
Software Package:
Qmail-1.03 qmail Basic Sys
Article Title: Install postfix-based full-featured email server on linux (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
8. Enable cyrus-sasl-based authentication for postfix
Run the following command to check whether the postfix supports cyrus-style sasl authentic
named run with the following content:#! /Bin/shQmailduid = 'id-u qmaild'Nofilesgid = 'id-G qmaild'Exec/usr/local/bin/softlimit-M 2000000//Usr/local/bin/tcpserver-H-r-v-p-x/etc/tcp. SMTP. CDB/-U $ qmailduid-G $ nofilesgid 0 SMTP/var/Qmail/bin/Qmail-smtpd 2> 1
Go to the/var/Qmail/supervise/Qmail-smtpd/log directory and create a file named run. The content is as follows:#! /Bin/shExec/usr/local/bin/setuidgid qmaill/usr/local/bin/multilog t s2500000/var/log/Qmail-smtpd
Modify the Script Attribute
Phpphpmailer
Recently encountered a project need to send mail. The message was successfully sent using Phpmailer, but a problem was encountered while setting the display name (diplay name). You are using a exchange2010 SMTP server to send mail. When I switch to 163 Sina and other messages for sending, the display name of the settings will be normal feedback, but not for exchange. Want to ask, what is t
ToolsLocate local security settings. Local Policy. User Rights Assignment1. From the network access to the computer inside the general default has 5 users, in addition to admin outside we delete 4, of course, we have to build a own ID2. Forced shutdown from remote system, Admin account also deleted, no one left3. Deny access to this computer from the network remove ID4. Access this computer from the network, admin can also delete if you do not use si
glacier default connection port is 7626, WAY 2.4 is 8011, Netspy 3.0 is 7306, Yai virus is 1024 and so on.
(ii) By type of agreement:
Can be divided into ports such as TCP, UDP, IP, and ICMP (Internet Control Message Protocol). The following are mainly about TCP and
UDP port.
(1) TCP port
The TCP port, the Transmission Control protocol port, requires a connection between the client and the server to provide a reliable
of data transfer. Common include
CHATTR command to lock important information files on the server, such as/etc/passwd,/etc/group,/etc/shadow,/etc/sudoers,/etc/sysconfig/iptables,/var/spool/ Cron/root, etc.6) Disable ping (echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all)Today we mainly say the server security login whitelist settings, through the following two ways:1) iptables SSH port restricti
In order to facilitate the Internet access through public information networks such as China Telecom, teachers and students in our school can access those resources that can only be accessed within the campus network (some databases in the library, OA Office systems, etc ), the Network Center has activated the internal access proxy service. All faculty and staff who have applied for a campus network account (jaccount) and activated the email service c
"Next"; "cannot match 'cqdx. org 'dns server to get in touch with "prompt, click" OK "; select" Yes, install and configure DNS on this computer ", click" Next "; go to DNS "permission" Settings and select "and Win" ", Click" Next ", enter the administrator password for directory service recovery mode, and click" Next ". The summary is displayed. If everything works properly, click "Next". The system will c
The server is very time-critical, the generation of Linux server files, logs, and database connections are based on the logic of timeTask processing, if the time is not synchronized, then, the processing of the task, and the analysis of the problem log, the time is wrong, difficult to analyzeDirectly change the Linux server time, the impact is particularly large,
Linux Study Notes-DNS server settings
Recommender: sheke Information Release Date:
Background:---- The company uses a leased line to connect to Chinanet and obtains a section of class c ip address space (for example, 16). At the same time, it applies to chinanic for the Company domain name yourdomain.com, And now sets up a machine as the DNS ser
The following configuration is used in Web. configSend mail directly using localhost.The deployment encountered an exception on the server: Mailbox unavailable. The server response was:5.7.1 unable to relay for [email protected]You need to configure the SMTP server for IIS6 Manager1. Open IIS6 Manager using Control Pan
Vps security settings, server security dog
It is suitable for new users and friends who have access to VPS. It focuses on VPS security.
Prohibit ROOT login to ensure security;
Use DDoS deflate to defend against attacks;
Iftop Linux traffic monitoring tool;
Automatically backs up VPS to FTP space every day;
Upgrade NGINX of LNMP to the latest version.
1. Modify the SSH port
Vi/etc/ssh/sshd_config
world. However, Yahoo servers are independent of each other, and they only share this ID library. Therefore, Yahoo in China can change the settings of the SMTP server, but it cannot start Yahoo servers around the world to change together. So, as long as we activate the pop and SMTP of Yahoo, Yahoo China will not allow us to send emails using SMTP. We can send emails through Yahoo USA. Based on this analysi
"receive Mail POP3)" server address and "external Mail SMTP)" server address are "edu.enanshan.com ", the user name is "01", and then enter the corresponding password and other items.
3) at this point, you should be able to receive emails normally! However, an error may occur when sending emails. If other settings are normal, the error message "the
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