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Old 11-23-2008, 12:32 AM   #1
Josh1billion
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Setting up a mail server with Dovecot and/or Postfix with virtual domains


I installed Postfix, and later realized Dovecot was already installed. I believe they are both running.. simultaneously.. yet I haven't had any problems. Odd.

You may have already noticed that this is the first time I've set up a mail server. It's actually the first time I've had to set up a dedicated server on my own from scratch (it's a web server + mail server + nameserver + FTP server). Anyway, so far so good. I have it set up in such a way that my Linux users are e-mail accounts, i.e. to create a new e-mail address, all I have to do is set up a new Linux user.

However, that only pertains to my main domain name. I also have a few other domain names hosted as virtual domains on this server. How can I create e-mail accounts that are "at" (@) the other domains? I have the nameserver section already complete (MX records are good), I just need to know how to create the e-mail addresses for these other domains.
 
Old 11-23-2008, 01:03 AM   #2
billymayday
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Quote:
Originally Posted by Josh1billion View Post
I installed Postfix, and later realized Dovecot was already installed. I believe they are both running.. simultaneously.. yet I haven't had any problems. Odd.
What's odd about that? One's an MTA, the other an imap/pop server. They are meant to run together.

Start by reading http://www.postfix.org/VIRTUAL_README.html and decide how fancy you want to get (key thinking points will be number of domains, number of users in each, etc.)
 
Old 11-23-2008, 03:35 AM   #3
Josh1billion
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Quote:
Originally Posted by billymayday View Post
What's odd about that? One's an MTA, the other an imap/pop server. They are meant to run together.

Start by reading http://www.postfix.org/VIRTUAL_README.html and decide how fancy you want to get (key thinking points will be number of domains, number of users in each, etc.)
Oh, I figured they were essentially the same thing.

Link isn't working at the moment; I'll have to check it later. But essentially, I have about three domains that need e-mail addresses, and I'll only need about.. five or less addresses on each.
 
Old 11-25-2008, 03:04 PM   #4
Josh1billion
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I took a look at that link and set up Postfix so that it recognizes my virtual domains (i.e. it will no longer reject e-mails sent to those domains).

But how do I now create e-mail addresses under those virtual domains?
 
Old 11-25-2008, 03:22 PM   #5
billymayday
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See the example given in the link titled "Postfix virtual MAILBOX example: separate domains, non-UNIX accounts"

Code:
10 /etc/postfix/vmailbox:
11     info@example.com    example.com/info
12     sales@example.com   example.com/sales/
13     # Comment out the entry below to implement a catch-all.
14     # @example.com      example.com/catchall
15     ...virtual mailboxes for more domains...
where info@example.com is a virtual email address and its mailbox is in $virtual_mailbox_base/example.com/info.

Note you can have virtual aliases and whatnot as well (they show an alias example on lines 17/18

Important note - you would create this file (vmailbox) with a text editor, but you must execute "postmap /etc/postfix/vmailbox" for postfix to be able to use it as specified. Ditto for the virtual alias file (anything you see referred to with has: in main.cfexcept the main alias file which requires you run newaliases).
 
Old 11-25-2008, 04:13 PM   #6
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I have now added the following code to the files indicated (without the numbers to the left and filenames, of course). I am trying to create the e-mail addresses EMAILREMOVED and EMAILREMOVED for the joshforde.com virtual domain, hosted on my server whose main domain name is seedsoftime.net

Code:
     1 /etc/postfix/main.cf:
     2     virtual_mailbox_domains = joshforde.com
     3     virtual_mailbox_base = /var/mail/vhosts
     4     virtual_mailbox_maps = hash:/etc/postfix/vmailbox
     5     virtual_minimum_uid = 100
     6     virtual_uid_maps = static:5000
     7     virtual_gid_maps = static:5000
     8     virtual_alias_maps = hash:/etc/postfix/virtual
     9 
    10 /etc/postfix/vmailbox:
    11     EMAILREMOVED joshforde.com/admin/
    12     EMAILREMOVED joshforde.com/josh/
I then typed the commands "postfix reload", "postmap /etc/postfix/vmailbox", and "postmap /etc/postfix/virtual" as indicated in the guide.

Of course.. I am not yet able to log in with my e-mail client, which isn't surprising as I haven't yet seen any place in configuration files to enter passwords for the two e-mail addresses I tried to create. What else am I missing / Where do I enter passwords?

Last edited by Josh1billion; 11-25-2008 at 04:38 PM.
 
Old 11-25-2008, 04:17 PM   #7
billymayday
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First, I'd take those emails out of your post in cash they get harvested.

Nothing I don't think (you probably needed to do the postmapping prior to the reload). Send a message to one of those accounts and see if anything gets created in the relevant mailbox (are you wanting Maildir format?)
 
Old 11-25-2008, 04:39 PM   #8
Josh1billion
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Thanks for the heads-up, I forgot about e-mail harvesting for a minute.

Quote:
Originally Posted by billymayday View Post
Send a message to one of those accounts and see if anything gets created in the relevant mailbox (are you wanting Maildir format?)
What is Maildir format?

EDIT:

I tried sending a test e-mail to the address, and it didn't work. Here's the message shown in Mozilla Thunderbird:

http://i35.tinypic.com/20fpbtz.png

Last edited by Josh1billion; 11-25-2008 at 04:45 PM.
 
Old 11-25-2008, 04:48 PM   #9
billymayday
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Maildir is basically where each message is a file in itself, whereas mbox is one big file with all the messages one after the other. I think most people prefer maildir, since it's less open to corruption, faster to perform certain actions on (such as delting a message) etc.

Doesn't really matter. The "/" at the end of the location is the giveaway.

One thing though, maildir uses 3 directories for each account (cur, new and tmp). The delivery probably creates these for a new account on first delivery, but it's possible you will get an error and need to create these manually.

Did you get any mail delivered? If not, "tail /var/log/maillog"
 
Old 11-26-2008, 08:32 PM   #10
Josh1billion
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...

This is all going over my head. >_< Server configuration is definitely not my thing.
 
Old 11-26-2008, 08:50 PM   #11
billymayday
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Doesn't really matter - leave it as is.


How's it going otherwise?
 
Old 11-27-2008, 02:36 AM   #12
Josh1billion
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Nothing really changed since my last couple of replies.. I can't figure out how to create an e-mail address for the virtual domain. :/ Most of the information in the above link is beyond my comprehension. I'm surprised I was able to set up a everything I did so far (nameserver, FTP, virtual domain hosting, etc.) on this machine.
 
Old 11-27-2008, 02:57 AM   #13
billymayday
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Can you be specific? The example given seems pretty clear to me.

Rgds

BM
 
  


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