Problems with Courier setup

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Hash: SHA256

Good morning,

> ·         How do I download our POP Mails from our ISP mailbox? We
> usually receive all our mails into a central mailbox in our ISP
> Server, then we pull the mails down into our Server where the mails
> are automatically distributed by our Mail Server to the respective
> users. How do I achieve this configuration with Courier? I have
> checked the Webadmin and I did not see this option

In order to do this, you'll need to use a tool like fetchmail or getmail
on your mail server. Configure it to contact you're ISP's pop3 server
and grab mail, then hand it to courier. Usually configuring fetchmail to
deliver retrieved mail to 127.0.0.1 on port 25 will do it if courier's
running on the same machine. You may have to adjust for your individual
setup though. Just one thing. Be careful. fetchmail doesn't handle
things like "user unknown" errors from the target SMTP server very well.
At least it didn't back when I used to use it for pulling mail from my
college's mail server. That was a while ago, so maybe they've introduced
logic to more gracefully handle that now.

> ·         AUTHENTICATION is a problem. I assumed Courier will use
> /etc/passwd file to authenticate, but this is not so, as I keep
> getting the message that my password was not accepted by the Server

Courier can use several different methods for authentication.
/etc/passwd is one option. It all depends on how you configured
authdaemon. Also, make sure you have authdaemon running. The Courier
installation instructions discuss authentication in some detail. Most
likely, it'll tell you everything you need to know.
- --
Stress (N): The condition that occurs when ones mind overrides the
body's natural desire to reach out and slap the hell out of someone
who desperately deserves it.
Joseph C. Lininger, <jbahm@...>
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Alexander Hotmail wrote:
> I just setup Courier, and I am able to send mails to the outside world

May I ask you why do you write via Hotmail, then?

> but I have two problems:

Hm... I guess you'll find out more :-)

You need to understand and configure DNS, before running Courier. Are
you familiar with MX records?

> ·         How do I download our POP Mails from our ISP mailbox? We
> usually receive all our mails into a central mailbox in our ISP Server,
> then we pull the mails down into our Server where the mails are
> automatically distributed by our Mail Server to the respective users.
> How do I achieve this configuration with Courier? I have checked the
> Webadmin and I did not see this option

May I ask you why don't you receive your mail directly at your server's?

> ·         AUTHENTICATION is a problem. I assumed Courier will use
> /etc/passwd file to authenticate, but this is not so, as I keep getting
> the message that my password was not accepted by the Server

Please, read http://www.courier-mta.org/authlib/README_authlib.html


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I sent mails out through hotmail because if I send out through courier, I
cannot receive replies due to the authentication problems I have.
In all the materials I have read about Courier, I have not seen anything
said about DNS and MX records. Do I really need to use DNS and MX records?
We receive our Mails through our ISP who is based in Italy. The way it works
is that our Mails are delivered to our ISP and we now download from there.
We have over a hundred mail users here.

THANK you very much for the piece about Authentication. After reading it, I
now have a perfect understanding of the Courier Authentication process, and
I believe I will be able to proceed now and make this work.
I know about DNS and MX records, but we do not use these in our Windows Mail
Server to receive our Mails, and we use the same ISP for our LINUX Server
Mails. Thank you very much once again. The Authentication piece is so clear
that I am certain COURIER will work now.
But I will also appreciate if you can send me something about COURIER using
DNS and MX records.


Thanks
Alexander

-----Original Message-----
From: Alessandro Vesely [mailto:vesely@...]
Sent: Wednesday, September 23, 2009 4:08 PM
To: Alexander Hotmail
Cc: courier-users@...
Subject: Re: [courier-users] Problems with Courier setup

Alexander Hotmail wrote:
> I just setup Courier, and I am able to send mails to the outside world

May I ask you why do you write via Hotmail, then?

> but I have two problems:

Hm... I guess you'll find out more :-)

You need to understand and configure DNS, before running Courier. Are
you familiar with MX records?

> .         How do I download our POP Mails from our ISP mailbox? We
> usually receive all our mails into a central mailbox in our ISP Server,
> then we pull the mails down into our Server where the mails are
> automatically distributed by our Mail Server to the respective users.
> How do I achieve this configuration with Courier? I have checked the
> Webadmin and I did not see this option

May I ask you why don't you receive your mail directly at your server's?

> .         AUTHENTICATION is a problem. I assumed Courier will use
> /etc/passwd file to authenticate, but this is not so, as I keep getting
> the message that my password was not accepted by the Server

Please, read http://www.courier-mta.org/authlib/README_authlib.html



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Alexander Hotmail writes:

> I sent mails out through hotmail because if I send out through courier, I
> cannot receive replies due to the authentication problems I have.

One's ability to receive replies has nothing to do with the mail server that
sent the original messages. Although hotmail.com publishes SPF records, and
mail sent with a @hotmail.com return address from your own server may be
refused by some recipients that check SPF records, that affects only sending
the mail. It has no effect on receiving to replies, presuming that the
original message has been delivered.

> In all the materials I have read about Courier, I have not seen anything
> said about DNS and MX records. Do I really need to use DNS and MX records?

If you want to receive mail on your IP address, you need a domain and an MX
record specifying your IP address.

> We receive our Mails through our ISP who is based in Italy. The way it works
> is that our Mails are delivered to our ISP and we now download from there.
> We have over a hundred mail users here.

Presuming that you mean that you already have your own domain, you already
have an MX record that points to your ISP's mail servers. Changing it at
your own IP address will result in anyone sending mail to your domain trying
to deliver that mail to your IP address.




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Thank you very much once again Alessandro. Incidentally, we have the same
name.
The other problem I have is PULLING our mails from our ISP Server in Italy
into the separate mailboxes in our Courier Server here.
I have tried FETCHMAIL, but I am not too happy with it. Do you have any
suggestions? I will deeply appreciate it.

Alexander

-----Original Message-----
From: Alessandro Vesely [mailto:vesely@...]
Sent: Wednesday, September 23, 2009 4:08 PM
To: Alexander Hotmail
Cc: courier-users@...
Subject: Re: [courier-users] Problems with Courier setup

Alexander Hotmail wrote:
> I just setup Courier, and I am able to send mails to the outside world

May I ask you why do you write via Hotmail, then?

> but I have two problems:

Hm... I guess you'll find out more :-)

You need to understand and configure DNS, before running Courier. Are
you familiar with MX records?

> .         How do I download our POP Mails from our ISP mailbox? We
> usually receive all our mails into a central mailbox in our ISP Server,
> then we pull the mails down into our Server where the mails are
> automatically distributed by our Mail Server to the respective users.
> How do I achieve this configuration with Courier? I have checked the
> Webadmin and I did not see this option

May I ask you why don't you receive your mail directly at your server's?

> .         AUTHENTICATION is a problem. I assumed Courier will use
> /etc/passwd file to authenticate, but this is not so, as I keep getting
> the message that my password was not accepted by the Server

Please, read http://www.courier-mta.org/authlib/README_authlib.html



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Sam Varshavchik wrote:
> Alexander Hotmail writes:
>> In all the materials I have read about Courier, I have not seen anything
>> said about DNS and MX records. Do I really need to use DNS and MX
>> records?
>
> If you want to receive mail on your IP address, you need a domain and an
> MX record specifying your IP address.

In addition, DNS lookup is critical enough on a mail server that
postmasters are usually better off running at least a cache DNS server
on the same or a nearby machine.

Alexander Hotmail wrote:
> I have tried FETCHMAIL, but I am not too happy with it. Do you have any
> suggestions? I will deeply appreciate it.

AFAICR, it is very flexible and works more reliably than, say,
msPOP3connector. Ask on the fetchmail-users mailing list for specific
details.

At any rate, you'll have to configure addresses translation, e.g. mail
retrieved from a account OLD will be sent to account NEW at a local
domain. Use testmxlookup to verify the domain. Note that OLD and NEW
cannot be at the same domain, otherwise mail to NEW will be routed to
your ISP's server by the same logic that brought it there the first
time. That logic is described in section "5.1. Locating the Target
Host" of SMTP http://tools.ietf.org/html/rfc5321#section-5.1



















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Hi,
I configured the userdb parameters, and when I tried AUTHEST, I was
successfully authenticated.
The problem is that when I try to connect from a Windows system using
Outlook express, my password is rejected.
I also tried from a LINUX client system and I have the same problem. However
when I telnet to ports 110, 25 or 143 on the COURIER Server from other
systems (both Windows and Linux), it works perfectly, but I just cannot have
a connection from a Mail client on those systems. Any ideas please?

Alexander
-----Original Message-----
From: Alessandro Vesely [mailto:vesely@...]
Sent: Wednesday, September 23, 2009 4:08 PM
To: Alexander Hotmail
Cc: courier-users@...
Subject: Re: [courier-users] Problems with Courier setup

Alexander Hotmail wrote:
> I just setup Courier, and I am able to send mails to the outside world

May I ask you why do you write via Hotmail, then?

> but I have two problems:

Hm... I guess you'll find out more :-)

You need to understand and configure DNS, before running Courier. Are
you familiar with MX records?

> .         How do I download our POP Mails from our ISP mailbox? We
> usually receive all our mails into a central mailbox in our ISP Server,
> then we pull the mails down into our Server where the mails are
> automatically distributed by our Mail Server to the respective users.
> How do I achieve this configuration with Courier? I have checked the
> Webadmin and I did not see this option

May I ask you why don't you receive your mail directly at your server's?

> .         AUTHENTICATION is a problem. I assumed Courier will use
> /etc/passwd file to authenticate, but this is not so, as I keep getting
> the message that my password was not accepted by the Server

Please, read http://www.courier-mta.org/authlib/README_authlib.html



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Alexander Hotmail wrote:
> I configured the userdb parameters, and when I tried AUTHEST, I was
> successfully authenticated.
> The problem is that when I try to connect from a Windows system using
> Outlook express, my password is rejected.
> I also tried from a LINUX client system and I have the same problem. However
> when I telnet to ports 110, 25 or 143 on the COURIER Server from other
> systems (both Windows and Linux), it works perfectly, but I just cannot have
> a connection from a Mail client on those systems. Any ideas please?

My guess is that client systems send different credentials than what
you do manually. You may enable DEBUG_LOGIN in authdaemonrc, or sniff
cleartext connections, to find out.


























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Alexander Hotmail wrote:
> I tried the following:
> ·         telnet localhost 110
> ·         +OK Hello there
> ·         User manager
> ·         +OK password required
> ·         Pass mailuser
> ·         -ERR chdir Maildir failed
>
> What is the reason for the error message please?

I'd bet the user's Maildir. Try `authtest manager` and check the
permissions in the Home Directory's subdirectories.





























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Alexander Hotmail wrote:
That seems pretty obvious.  Either the maildir doesn't exist, or the
user doesn't have permission to read it.

Run "authtest manager".  If there is a Maildir entry, take a look at the
permissions for that folder.  If there is no Maildir entry, look at the
"Maildir" folder in the home directory.  The authtest will also show you
the effective UID and GID for the login.  This user must have read/write
permissions for the maildir.

--
Bowie

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Thanks all. This is solved now.
The problem was that I created a directory "maildir" meanwhile the system
was looking for "Maildir". The difference was the upper case letters.
These things look small but they are important.

Thanks
Alexander

-----Original Message-----
From: Bowie Bailey [mailto:Bowie_Bailey@...]
Sent: Wednesday, September 30, 2009 2:26 PM
To: courier-users@...
Subject: Re: [courier-users] Problems with Courier setup

Alexander Hotmail wrote:
That seems pretty obvious.  Either the maildir doesn't exist, or the
user doesn't have permission to read it.

Run "authtest manager".  If there is a Maildir entry, take a look at the
permissions for that folder.  If there is no Maildir entry, look at the
"Maildir" folder in the home directory.  The authtest will also show you
the effective UID and GID for the login.  This user must have read/write
permissions for the maildir.

--
Bowie

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Hi All,
I have remarkable progress. Now AUTHEST works smoothly and I can login
through both IMAP and POP3 on localhost.
But I have just one little problem.
I am using the Courier IMAP/POP3 Proxy feature to redirect the user to
download his mails from an external Server.
Using USERDB, how do I specify the Mail accountname and password the user is
to use to connect to the external mail server.

I have used the following below to set the mailhost:

Userdb user@... set options=mailhost=serverext@...

This command tells the Courier Server to proxy to serverext@... to
download user@...'s mails.
Buy how do I set the external server's account name and password using
userdb?


Thanks
Alexander
























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Alexander Hotmail writes:

> Hi All,
> I have remarkable progress. Now AUTHEST works smoothly and I can login
> through both IMAP and POP3 on localhost.
> But I have just one little problem.
> I am using the Courier IMAP/POP3 Proxy feature to redirect the user to
> download his mails from an external Server.
> Using USERDB, how do I specify the Mail accountname and password the user is
> to use to connect to the external mail server.

The proxy always uses the same userid and password for proxied connections.



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