LinuxQuestions.org
LinuxAnswers - the LQ Linux tutorial section.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices

Reply
 
LinkBack Search this Thread
Old 11-18-2009, 06:36 AM   #1
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Rep: Reputation: 15
Thumbs up Exchange to postfix


Hi all,
Thanks to all of you for helping me in this forum till date.I need some clarification for establishing a mail server in my production environment.My existing network structure includes a Windows 2003 domain controller(Running DNS ) and Microsoft exchange server 2003....Is it possible to replace exchange server with postfix(Suse Linux Enterprise Linux 11)without disturbing the current setup and import the mails from exchange server to postfix and remove exchange server completely?Can i check my new postfix setup in a new environment and then add this to the existing setup.Please give your valuable suggestions.Thanks

Last edited by fizeelinux; 11-18-2009 at 08:41 AM. Reason: Additional Question arised
 
Old 11-18-2009, 08:40 AM   #2
TB0ne
Guru
 
Registered: Jul 2003
Location: Birmingham, Alabama
Distribution: SuSE, RedHat, Slack,CentOS
Posts: 13,789

Rep: Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359
Quote:
Originally Posted by fizeelinux View Post
Hi all,
Thanks to all of you for helping me in this forum till date.I need some clarification for establishing a mail server in my production environment.My existing network structure includes a Windows 2003 domain controller(Running DNS ) and Microsoft exchange server 2003....Is it possible to replace exchange server with postfix without disturbing the current setup and import the mails from exchange server to postfix and remove exchange server completely?Can i check my new postfix setup in a new environment and then add this to the existing setup.Please give your valuable suggestions.Thanks
Yes, it's possible. If you want to build a new environment and run it parallel, why would it bother/matter the current Exchange servers?? My advice would be to build the new mail servers, and test them. Migrate a few technically-savvy users over, and have them use it, and get the kinks worked out.

Then, when the final migration date comes up, use imapsync to migrate the messages from Exchange to Postfix, and make your DNS changes accordingly. I'd also leave the existing mail system in place, but UNPLUGGED FROM THE NETWORK, for a while, just to make sure things aren't getting bounced to it.
 
Old 11-20-2009, 12:44 AM   #3
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Original Poster
Rep: Reputation: 15
Quote:
Originally Posted by TB0ne View Post
Yes, it's possible. If you want to build a new environment and run it parallel, why would it bother/matter the current Exchange servers?? My advice would be to build the new mail servers, and test them. Migrate a few technically-savvy users over, and have them use it, and get the kinks worked out.

Then, when the final migration date comes up, use imapsync to migrate the messages from Exchange to Postfix, and make your DNS changes accordingly. I'd also leave the existing mail system in place, but UNPLUGGED FROM THE NETWORK, for a while, just to make sure things aren't getting bounced to it.
Thanks for your suggestions...I have installed postfix in my OPENSUSE11.1 and as of now i am able to send mails internally as well as to another machine running Sendmail as MTA.(But the requirement is that end users will use outlook express for interacting with the mail server with their user accounts)..Is it possible to add a additional MX record for the postfix mail server?.Will this conflict with my existing exchange server MX records and mails.?How can i proceed in this?

Lastly should i need to create users of my corporate domain with mail boxes individually or is it possible to import all the users of my exchange server to this machine(postfix) and run both the machines in parallel.Please don't think i am keeping on asking questions.I am new to linux and i am learning ...Thanks

Last edited by fizeelinux; 11-20-2009 at 12:49 AM.
 
Old 11-20-2009, 01:28 AM   #4
linuxlover.chaitanya
Senior Member
 
Registered: Apr 2008
Location: Nagpur, India
Distribution: Cent OS 5/6, Ubuntu Server 10.04
Posts: 4,615

Rep: Reputation: Disabled
You should be able to add the MX record without issues I guess. And there should not be much changes done for using a mail client. It should just work fine. You would just need to make sure of other things like the authentication methods used previously.
As suggested imapsync tool can help you in migrating but it needs the user passwords for migration. So you will either need users to input the passwords or crack them. The later option is just not right.
You have another option of using Zimbra suite. It has an open source version as well where you do not need to buy the license. Zimbra has got some tools to migrate the exchange to zimbra without needing any user passwords. Just the admin passwords. So it should be more than feasible to migrate to Zimbra. Plus it is easy to implement so that you put more time on the constructive things.
 
Old 11-24-2009, 05:19 AM   #5
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Original Poster
Rep: Reputation: 15
Arrow

Quote:
Originally Posted by linuxlover.chaitanya View Post
You should be able to add the MX record without issues I guess. And there should not be much changes done for using a mail client. It should just work fine. You would just need to make sure of other things like the authentication methods used previously.
As suggested imapsync tool can help you in migrating but it needs the user passwords for migration. So you will either need users to input the passwords or crack them. The later option is just not right.
You have another option of using Zimbra suite. It has an open source version as well where you do not need to buy the license. Zimbra has got some tools to migrate the exchange to zimbra without needing any user passwords. Just the admin passwords. So it should be more than feasible to migrate to Zimbra. Plus it is easy to implement so that you put more time on the constructive things.
Thanks Chaintanya...Since i am new to linux i am thinking of checking the postfix configuration(in Opensuse 11.1) with the new domain(gftindia.org).I have got access to the cpanel details for the new domain..Once i am equipped with the new setup(postfix mail server for the new domain) i can move towards changing exchange to postfix...I am doing this in the existing setup of my network(Windows 2003 already running dns service for another domain say abc.com).Now i have installed a postfix server(machine name linux.gftindia.org,with ip 172.24.1.120)(includes local dns service for a new domain gftindia.org) in the same lan.Please note that this postfix machine uses the same gateway(172.24.1.1) as all other machines on the lan with the only thing that postfix installed machine is in a different domain(gftindia.org).I am particular in this since i dont want to make problems with my existing setup.As of now i have added (A)host record only for the postfix mail server.I have plenty of questions to get clarified.I think you wont mistake me as i am learing things.

When i run the dig utility for checking name resolution i got the following messages


Code:
dig -x 172.24.1.120

; <<>> DiG 9.5.0-P2 <<>> -x 172.24.1.120
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8541
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;120.1.24.172.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
120.1.24.172.in-addr.arpa. 604800 IN	PTR	linux.

;; AUTHORITY SECTION:
1.24.172.in-addr.arpa.	604800	IN	NS	linux.

;; Query time: 0 msec
;; SERVER: 172.24.1.120#53(172.24.1.120)
;; WHEN: Tue Nov 24 15:36:50 2009
;; MSG SIZE  rcvd: 76

and dig -q linux.gftindia.org reveals
Code:
; <<>> DiG 9.5.0-P2 <<>> -q linux.gftindia.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18445
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;linux.gftindia.org.		IN	A

;; ANSWER SECTION:
linux.gftindia.org.	172800	IN	A	172.24.1.120

;; AUTHORITY SECTION:
gftindia.org.		172800	IN	NS	linux.gftindia.org.

;; Query time: 0 msec
;; SERVER: 172.24.1.120#53(172.24.1.120)
;; WHEN: Tue Nov 24 15:43:06 2009
;; MSG SIZE  rcvd: 66
Digging other domains(like gmail,yahoo) works.May i know how it is able to resolve as i havent included any other ip's for resolving in /etc/resolv.conf or in the forwarders section of the named.conf file.Please let me knw what is making this resolution.

I guess the name resolution is happening correctly....
Postfix configuration includes
................
inet_interfaces = all

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

mydomain = gftindia.org

myhostname = linux.gftindia.org
mynetworks_style = subnet
mynetworks_style = subnet
relay_domains = $mydestination
myorigin = $myhostname
.............................

I am able to send mails within the systems to all of my user accounts but if i try to send mails from outlook express to one of the account of my mail server it fails.

I am able to telnet the postfix machine
telnet 172.24.1.120 25
220 linux.gftindia.org ESMTP Postfix

But telnet linux.gftindia.org 25 fails
I thought this could be becoz of dns issues so i included the ip address of postfix machine(since it is my dns and mail server) in the dns network settings of my windows machine.Now pinging by name works well.Configuring 'you@linux.gftindia.org' in outlook express i am able to send mail to 'root@linux.gftindia.org' account but reverse sending mail from 'root@linux.gftindia.org' is not getting to you@linux.gftindia.org outlook express configured account but instead it is getting into 'mutt' of the user 'you'....

How come i am able to send mails to all domains but the postfix configuration being relay_domains = $mydestination..i guess user at this domain will be able to route messges within the domain .I am really in confusion.Please help me on this.Thanks

Last edited by fizeelinux; 11-24-2009 at 06:33 AM.
 
Old 11-26-2009, 12:09 AM   #6
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Original Poster
Rep: Reputation: 15
Quote:
Originally Posted by fizeelinux View Post
Thanks Chaintanya...Since i am new to linux i am thinking of checking the postfix configuration(in Opensuse 11.1) with the new domain(gftindia.org).I have got access to the cpanel details for the new domain..Once i am equipped with the new setup(postfix mail server for the new domain) i can move towards changing exchange to postfix...I am doing this in the existing setup of my network(Windows 2003 already running dns service for another domain say abc.com).Now i have installed a postfix server(machine name linux.gftindia.org,with ip 172.24.1.120)(includes local dns service for a new domain gftindia.org) in the same lan.Please note that this postfix machine uses the same gateway(172.24.1.1) as all other machines on the lan with the only thing that postfix installed machine is in a different domain(gftindia.org).I am particular in this since i dont want to make problems with my existing setup.As of now i have added (A)host record only for the postfix mail server.I have plenty of questions to get clarified.I think you wont mistake me as i am learing things.

When i run the dig utility for checking name resolution i got the following messages


Code:
dig -x 172.24.1.120

; <<>> DiG 9.5.0-P2 <<>> -x 172.24.1.120
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8541
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;120.1.24.172.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
120.1.24.172.in-addr.arpa. 604800 IN	PTR	linux.

;; AUTHORITY SECTION:
1.24.172.in-addr.arpa.	604800	IN	NS	linux.

;; Query time: 0 msec
;; SERVER: 172.24.1.120#53(172.24.1.120)
;; WHEN: Tue Nov 24 15:36:50 2009
;; MSG SIZE  rcvd: 76

and dig -q linux.gftindia.org reveals
Code:
; <<>> DiG 9.5.0-P2 <<>> -q linux.gftindia.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18445
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;linux.gftindia.org.		IN	A

;; ANSWER SECTION:
linux.gftindia.org.	172800	IN	A	172.24.1.120

;; AUTHORITY SECTION:
gftindia.org.		172800	IN	NS	linux.gftindia.org.

;; Query time: 0 msec
;; SERVER: 172.24.1.120#53(172.24.1.120)
;; WHEN: Tue Nov 24 15:43:06 2009
;; MSG SIZE  rcvd: 66
Digging other domains(like gmail,yahoo) works.May i know how it is able to resolve as i havent included any other ip's for resolving in /etc/resolv.conf or in the forwarders section of the named.conf file.Please let me knw what is making this resolution.

I guess the name resolution is happening correctly....
Postfix configuration includes
................
inet_interfaces = all

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

mydomain = gftindia.org

myhostname = linux.gftindia.org
mynetworks_style = subnet
mynetworks_style = subnet
relay_domains = $mydestination
myorigin = $myhostname
.............................

I am able to send mails within the systems to all of my user accounts but if i try to send mails from outlook express to one of the account of my mail server it fails.

I am able to telnet the postfix machine
telnet 172.24.1.120 25
220 linux.gftindia.org ESMTP Postfix

But telnet linux.gftindia.org 25 fails
I thought this could be becoz of dns issues so i included the ip address of postfix machine(since it is my dns and mail server) in the dns network settings of my windows machine.Now pinging by name works well.Configuring 'you@linux.gftindia.org' in outlook express i am able to send mail to 'root@linux.gftindia.org' account but reverse sending mail from 'root@linux.gftindia.org' is not getting to you@linux.gftindia.org outlook express configured account but instead it is getting into 'mutt' of the user 'you'....

How come i am able to send mails to all domains but the postfix configuration being relay_domains = $mydestination..i guess user at this domain will be able to route messges within the domain .I am really in confusion.Please help me on this.Thanks
Hi,

I googled and found some solutions .I configured courier imap with postfix mailserver.Now i am able to configure mail account settings in my outlook express for imap .But if i configure for pop3 it gives me Your password was rejected .Temporary problem please try again later.
I am using the same authentication settings for pop3 as imap.Both are using authuserdb(which means /etc/password,think i am not wrong)....while in windows command prompt i checked whether i am able to communicate with the user in the mail server and these are my outputs...

cmd>telnet 172.24.1.120 110

+OK Hello there
user xyz
+OK Password required
pass ****
-ERR Temporary problem ,please try again later

Connection to host lost.

cmd>telnet 172.24.1.120 143
*OK...............
..........................
a login xyz ****
a OK LOGIN Ok.

My authdaemonrc file contains
..................................
authmodulelist="authuserdb authpam authldap authcustom authpipe"
......................................

I created a log with monitoring the authdaemond it shows the following

Code:
INFO: modules="authuserdb authpam authldap authcustom authpipe", daemons=5
INFO: Installing libauthuserdb
INFO: Installation complete: authuserdb
INFO: Installing libauthpam
INFO: Installation complete: authpam
INFO: Installing libauthldap
INFO: Installation complete: authldap
INFO: Installing libauthcustom
INFO: Installation complete: authcustom
INFO: Installing libauthpipe
INFO: Installation complete: authpipe
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
I found that whenever i give the username and password for pop3 in the windows command prompt "ERR: ldap_simple_bind_s failed: Can't contact LDAP server" pops up.But i didnt use ldap authentication for imap same suits for my pop3 .Please let me know whether there is any pop3file i need to specify for local authentication setting other than authdaemonrc file

Please let me know where i am wrong since i am facing this problem only for pop3 protocol and not for imap.
 
Old 12-10-2009, 08:28 AM   #7
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Original Poster
Rep: Reputation: 15
Quote:
Originally Posted by fizeelinux View Post
Hi,

I googled and found some solutions .I configured courier imap with postfix mailserver.Now i am able to configure mail account settings in my outlook express for imap .But if i configure for pop3 it gives me Your password was rejected .Temporary problem please try again later.
I am using the same authentication settings for pop3 as imap.Both are using authuserdb(which means /etc/password,think i am not wrong)....while in windows command prompt i checked whether i am able to communicate with the user in the mail server and these are my outputs...

cmd>telnet 172.24.1.120 110

+OK Hello there
user xyz
+OK Password required
pass ****
-ERR Temporary problem ,please try again later

Connection to host lost.

cmd>telnet 172.24.1.120 143
*OK...............
..........................
a login xyz ****
a OK LOGIN Ok.

My authdaemonrc file contains
..................................
authmodulelist="authuserdb authpam authldap authcustom authpipe"
......................................

I created a log with monitoring the authdaemond it shows the following

Code:
INFO: modules="authuserdb authpam authldap authcustom authpipe", daemons=5
INFO: Installing libauthuserdb
INFO: Installation complete: authuserdb
INFO: Installing libauthpam
INFO: Installation complete: authpam
INFO: Installing libauthldap
INFO: Installation complete: authldap
INFO: Installing libauthcustom
INFO: Installation complete: authcustom
INFO: Installing libauthpipe
INFO: Installation complete: authpipe
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
ERR: ldap_simple_bind_s failed: Can't contact LDAP server
I found that whenever i give the username and password for pop3 in the windows command prompt "ERR: ldap_simple_bind_s failed: Can't contact LDAP server" pops up.But i didnt use ldap authentication for imap same suits for my pop3 .Please let me know whether there is any pop3file i need to specify for local authentication setting other than authdaemonrc file

Please let me know where i am wrong since i am facing this problem only for pop3 protocol and not for imap.
Safe to say noone is ready to help in this forum
 
0 members found this post helpful.
Old 12-10-2009, 12:25 PM   #8
TB0ne
Guru
 
Registered: Jul 2003
Location: Birmingham, Alabama
Distribution: SuSE, RedHat, Slack,CentOS
Posts: 13,789

Rep: Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359Reputation: 2359
Quote:
Originally Posted by fizeelinux View Post
Safe to say noone is ready to help in this forum
You got quite a bit of help, and don't even care to acknowledge it, since no one answers you quick enough to suit you??

I will keep the answer to myself, since you can go look it up somewhere. Good luck getting help ANYWHERE with that attitude.
 
Old 12-11-2009, 12:25 AM   #9
fizeelinux
Member
 
Registered: Nov 2008
Posts: 91

Original Poster
Rep: Reputation: 15
Quote:
Originally Posted by TB0ne View Post
You got quite a bit of help, and don't even care to acknowledge it, since no one answers you quick enough to suit you??

I will keep the answer to myself, since you can go look it up somewhere. Good luck getting help ANYWHERE with that attitude.
okay

Last edited by fizeelinux; 12-11-2009 at 12:35 AM.
 
Old 12-11-2009, 08:13 AM   #10
pixellany
LQ Veteran
 
Registered: Nov 2005
Location: Annapolis, MD
Distribution: Arch/XFCE
Posts: 17,802

Rep: Reputation: 728Reputation: 728Reputation: 728Reputation: 728Reputation: 728Reputation: 728Reputation: 728
Quote:
Originally Posted by fizeelinux View Post
Safe to say noone is ready to help in this forum
fizee;
1. Please do not post statments like this.

2. Please do not file reports when someone gets annoyed by statements like this.

The forum is staffed by volunteers. If you do not get immediate assistance, there may be MANY reasons.

There are 2 magic words here: Please and Patience.
 
1 members found this post helpful.
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Postfix, Courier, Spamassassin, and Exchange jstephens84 Linux - Server 4 08-11-2008 08:38 PM
Postfix and Exchange davidntexas Linux - Software 2 10-13-2006 09:09 PM
Using postfix with Exchange edan Linux - Software 3 06-01-2006 11:35 AM
Postfix as a frontend for Exchange, for Spamassassin jdavidow Linux - Networking 0 09-02-2004 05:48 AM
Postfix and Exchange dwpondscum Linux - Networking 0 07-16-2003 09:48 AM


All times are GMT -5. The time now is 05:12 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration