Linux sendmail+cyrus-imapd

The default is to install sendmail under rh5, which means that you can send a message. If you want to receive the letter in oe, you need to install the corresponding receiving service. This introduces cyrus-imap to achieve receiving. Cyrus has to install it yourself. You can insert the 2nd and 3rd installation CDs of Red Hat Enterprise Linux 5 into the CD-ROM drive. After loading the CD-ROM drive, find the following RPM package files related to the cyrus-imapd service in the Server directory of the CD:

cyrus- Imapd-perl-2.3.7-1.1.el5.i386.rpmcyrus-imapd-utils-2.3.7-1.1.el5.i386.rpmdb4-utils-4.3.29-9.fc6.i386.rpmlm_sensors-2.10.0- 3.1.i386.rpmcyrus-imapd-2.3.7-1.1.el5.i386.rpmcyrus-imapd-devel-2.3.7-1.1.el5.i386.rpm

Install using the rpm –ivh command.

2. The basic configuration of the cyrus-imapd service

The configuration files of the cyrus-imapd service have the following three.

/etc/sysconfig/cyrus-imapd: The configuration file used to start the cyrus-imapd service.

/etc/cyrus.conf: is the main configuration file for the cyrus-imapd service, which contains the setup parameters for each component (IMAP, POP3, sieve, and NNTP) in the service.

/etc/imapd.conf: is the configuration file for the IMAP service in the cyrus-imapd service.

By default, these configuration files are basically set up. As long as the cyrus-imapd service is started, both POP and IMAP services can be provided. Use the following command to start services such as cyrus and add cyrus to boot.

service saslauthd restartservice cyrus-imapd restartservice sendmail restartservice xinetd restart

chkconfig saslauthd onchkconfig cyrus-imapd onchkconfig sendmail on

Create a new user in linux, for example system maintenance user operator

#useradd operator

#passwd operator Set the password. For example, test

don't forget to set /etc/nologin in the passwd file to increase security.

Configure cyrus password

#passwd cyrus

Enter cyrus management tool

In the cyradm management command line state, you can use the following command to create additional folders such as Outbox, Trash, and Drafts for the user lbt under their mail box.

createmailbox user.lbt.Sendcreatemailbox user.lbt.Trashcreatemailbox user.lbt.Drafts

After creating the user mailbox user.lbt, I want to delete the mailbox directly with the deletemailbox command, even if it is Administrator cyrus is also not authorized (Permission denied). To remove it, you must first grant the administrator cyrus itself full control (all) with the following command. Then delete the mailbox with deletemailbox

localhost.localdomain> quit

You can test the user:

telnet localhost 110

the login :

user operator

pass test

You should see:

+OK Name is a valid mailbox

+OK Mailbox locked And ready

This is a success.

You need to set up Sendmail now, and then send the letter to cyrus. Edit the configuration file: /etc/mail/sendmail.mc, add a line at the end of the file:

dnl MAILER(smtp)dnl

dnl MAILER(procmail)dnl

define (`confLOCAL_MAILER', `cyrus')

MAILER(`cyrus')

If you want Sendmail to receive mail from other addresses in addition to this machine, put the following line
>

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

Change to:

dnl DAEMON_OPTIONS(`Port=smtp,Addr=0.0. 0.0, Name=MTA')dnl

Then, execute:

# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

You need to restart Sendmail:

service sendmail restart