Ioannis Vranos wrote:

>  I wish to be receiving my local mail (which consists of system log
>  messages), via a local POP3 server. However I found no POP3 daemon in
>  standard distribution with yumex. Isn't there any POP3 daemon in
>  standard SL 4.2?
>

Since SL is based on RHEL I'm surprised there aren't more references to 
the fine online manuals there. I presume that most of the documentation 
is identical or posted in the SL Docs 
<https://www.scientificlinux.org/documentation/> release notes or 
eratta? The RHEL Docs <http://www.redhat.com/docs/manuals/enterprise/> 
have lots of relevent information that should be read carefully, if you 
want to save time or avoid some nasty headaches & gotchas...
RHEL-4 Ref-guide: Email
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/ref-guide/ch-email.html
11.1.2. Mail Access Protocols - There are two primary protocols used by 
email client applications to retrieve email from mail servers: the /Post 
Office Protocol/ (/POP/) and the /Internet Message Access Protocol/ 
(/IMAP/).Unlike SMTP, both of these protocols require connecting clients 
to authenticate using a username and password. By default, passwords for 
both protocols are passed over the network unencrypted.
11.1.2.1. POP - The default POP server under Red Hat Enterprise Linux is 
/usr/sbin/ipop3d and is provided by the imap package. When using a POP 
server, email messages are downloaded by email client applications. By 
default, most POP email clients are automatically configured to delete 
the message on the email server after it has been successfully 
transferred, however this setting usually can be changed...

For MTA, I've always used Postfix - 
http://www.postfix.org/documentation.html
http://www.postfix.org/STANDARD_CONFIGURATION_README.html
http://www.redhat.com/support/resources/howto/RH-postfix-HOWTO/book1.html

The RHEL Docs describe the easiest way to switch from the default 
sendmail to postfix here...
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/ref-guide/s1-email-mta.html
*Note:* Before using Postfix, the default MTA must be switched from 
Sendmail to Postfix. Refer to the chapter called /Mail Transport Agent 
(MTA) Configuration/ in the /Red Hat Enterprise Linux System 
Administration Guide/ for further details.

RHEL-4 SysAdminGuide - SAG - Chapter 39. Mail Transport Agent (MTA) 
Configuration
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/sysadmin-guide/ch-switchmail.html

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Insanity is... repeating the same mistakes, while expecting different 
results. -Anon