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Replace an M$ Exchange Server

Posted on 2001-07-01
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Last Modified: 2010-03-18
Due to cost cutting by the bean counters we are being told to find an alternative, low cost(i.e. free) email system.
Having only limited experience in Linux what do I need to configure (RedHat 7.1) Sso that users can connect using Outlook Express or similar retrieve emails and send emails? We have a couple of domains so we don't need to dial-up our ISP etc.

TIA,

Bart.
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Question by:Bart van der Wee
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Expert Comment

by:j2
ID: 6244084
Everything is included. Redhat comes with sendmail, and pop/imap daemons to handle that. However, none of the "other" functions will work (as in schedules, booking meetings etc etc)

But for just mail, you are all set. Install linuxconf and you will find the sendmail configureation dialog there.
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Author Comment

by:Bart van der Wee
ID: 6246171
How abou pop3 mailboxes? Where are these configured?
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Expert Comment

by:j2
ID: 6246204
Just give the user an account on the system, and he has a pop3 mailbox. If you do not wwant to give him shell acess, just set the shell to /bin/false (under linuxcionf this is called a "pop account")
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by:Bart van der Wee
ID: 6246212
how do I enable the pop3 access from outlook express etc?
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Expert Comment

by:j2
ID: 6246223
Enable? Just point it to your linuxserver. Done.
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Author Comment

by:Bart van der Wee
ID: 6246345
I thought I had enabled port110 for pop3 and 25 for smtp but I am unable to telnet into these ports to see if pop/smtp is working. What else do I need to do?
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Expert Comment

by:j2
ID: 6246360
Make sure that you acutally have a popdaemon / sendmail installed. And how did you "enable the ports"?
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by:Bart van der Wee
ID: 6246494
sendmail works on port 25 (SMTP) doesn't it? So in theory I should be able to telnet to port 25 and send email that way or is this not possible?

For pop3 I have enabled that under the xinetd to run internal to xinetd. I can ping the ip address - I am actually using webmin to administer the pc remotely but I unable to connect to the pop3/smtp services.

I am just going to check that the setup didn't install that firewall stuff as that might be stopping this from working.

Bart.

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Expert Comment

by:j2
ID: 6246500
Sendmail has to be started to respond, and under 7.1 it _only_ listens to 127.0.0.1 See the Install guide (or Gotchas) for how to fix that. And exactly what did you change in xinetd?
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by:Bart van der Wee
ID: 6246502
I just enabled pop3
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by:Bart van der Wee
ID: 6246506
I will check the 127.0.0.1 issue now - thanks for that.
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Expert Comment

by:j2
ID: 6246509
Yes, but how? By changing the "Disabled" line in an existing pop definition, or writing your own? And once again: Is pop3d actually installed?
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Author Comment

by:Bart van der Wee
ID: 6246528
Like I said earlier I am using webmin to administer this box at present and under the config for xinetd there is listed pop3, on opening this by default it is disabled I chose to enable it. How do I check that pop3d is there?
Here is the contents of the ipop3 file found at /etc/xinetd.d
# default: off
# description: The POP3 service allows remote users to access their mail \
#              using an POP3 client such as Netscape Communicator, mutt, \
#            or fetchmail.
service pop3
{
     log_on_success += USERID
     log_on_failure += USERID
     socket_type = stream
     user = root
     type = INTERNAL
     wait = no
}

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Expert Comment

by:j2
ID: 6246540
It isnt installed. It should have a "server" line aswell as some other stuff. i would guess that webmin just doent care if it is installed or not. Do a

rpm -qa |grep -i imap

(sinte pop3d and imapd comes from the same package)

Also it should have

disable = no
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Author Comment

by:Bart van der Wee
ID: 6246575
Command history
> rpm -qa |grep -i imap
imap-2000-9
php-imap-4.0.4pl1-9
imap-devel-2000-9

 
Is what I get. I would seem to be installed I will have a play and try to get it working.
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Expert Comment

by:j2
ID: 6246583
Well, something is screwy with the xinetd config file tho...
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Author Comment

by:Bart van der Wee
ID: 6246599
in what way? should I do a full re-install?
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Accepted Solution

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j2 earned 200 total points
ID: 6246608
I would remove the pop3 xinetd file, and force a reinstall of the imap package, then enable pop3 with linuxconf or checkconfig and see if that works better then webmin.
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Author Comment

by:Bart van der Wee
ID: 6246812
where in linuxconf do I find this? I am in X windows - do I need to be in a console to see all options?
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Author Comment

by:Bart van der Wee
ID: 6643446
Points are yours thanks for the help - still no further but just doing some housekeeping =)
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