postfix help needed

Hi,

I am new to Linux so I hope to get some help setting up my mail server.

The host name of my linode is lixxx.members.linode.com and I am running Ubuntu 7.10. I installed postfix by "apt-get install postfix".

I am hosting multiple domains (e.g. foo.com and bar.com) I'd like to setup an email server so that I can send mails from [email protected] and [email protected]. I am basically following the tutorial at http://www.akadia.com/services/postfix_ … boxes.html">http://www.akadia.com/services/postfixseparatemailboxes.html

My main.cf is as follows:

Debian specific: Specifying a file name will cause the first

line of that file to be used as the name. The Debian default

is /etc/mailname.

myorigin = /etc/mailname

smtpdbanner = $myhostname ESMTP $mailname (Ubuntu)

biff = no

appending .domain is the MUA's job.

appenddotmydomain = no

Uncomment the next line to generate "delayed mail" warnings

delaywarningtime = 4h

TLS parameters

smtpdtlscert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

smtpdtlskey_file=/etc/ssl/private/ssl-cert-snakeoil.key

smtpdusetls=yes

smtpdtlssessioncachedatabase = btree:${queuedirectory}/smtpdscache

smtptlssessioncachedatabase = btree:${queuedirectory}/smtpscache

See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for

information on enabling SSL in the smtp client.

myhostname = lixxx.members.linode.com

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

myorigin = /etc/mailname

mydestination = lixxx.members.linode.com, localhost.members.linode.com, , localhost

relayhost =

mynetworks = 127.0.0.0/8

mailboxsizelimit = 0

recipient_delimiter = +

inet_interfaces = all

my own stuff

virtualmailboxdomains = foo.com, bar.com

virtualmailboxbase = /var/spool/mail

The content in /var/spool/mail:

[email protected]:/var/spool/mail # ll

total 24

drwxr-sr-x 2 root mail 4096 Mar 27 01:26 foo.com

drwxr-sr-x 2 root mail 4096 Mar 27 01:26 bar.com

I also modified the DNS settings of my domains in my registrar:

A record foo.com (my linode's IP)

C record mail.foo.com (my linode's host name, i.e. lixxx.members.linode.com)

MX record lixxx.members.linode.com

After all this, when I send mails to [email protected] I got all of them bounced back. The error message was like:

<[email protected]>: unknown user: "[email protected]"

Reporting-MTA: dns; lixxx.members.linode.com

X-Postfix-Queue-ID: F0889C8C6

X-Postfix-Sender: rfc822; [email protected]

Arrival-Date: Thu, 27 Mar 2008 04:47:54 -0400 (EDT)

What have I done wrong? Is it a file permission problem since the mail folders belong to root? Do I need a client besides postfix to read mail? Any help is much appreciated!

10 Replies

You don't seem to have virtualmailboxmaps implemented. This maps [email protected] to /var/spool/domain/user_mailbox.

You might also want to look at virtualaliasmaps. This is similar to a normal /etc/aliases file and allows you to deliver the mail to a local user as usual, or forward:

[email protected] root

[email protected] localuser

[email protected] [email protected]

This way you can read your mail any way you normally would on that system.

@pclissold:

You don't seem to have virtualmailboxmaps implemented. This maps [email protected] to /var/spool/domain/user_mailbox.

Thank you very much pclissold! It's right on! I created the virtualmailboxmaps text file but forget to linked to it in the main.cf. I should mentioned that postfix expects a .db file so I convert the text file to .db using the postmap command.

After that, I created a "vmail" user with uid and gid = 5000 and add the following lines to the main.cf file:

virtualuidmaps = static:5000

virtualgidmaps = static:5000

I also changed the mailbox folders to be owned by the "vmail" user. Now things seem to work. I grep the mail files and can see the incoming emails as text. What I really want to do is to access my mails from the web. Any recommendations on the software I should use? One thing I still can't wrap my head around is that, since my mails are owned by the vmail user which doesn't have login password/previlege, how are my mails password protected when I access them from the Web?

Thanks again!

James

@nabber00:

You might also want to look at virtualaliasmaps. This is similar to a normal /etc/aliases file and allows you to deliver the mail to a local user as usual, or forward:

[email protected] root

[email protected] localuser

[email protected] [email protected]

This way you can read your mail any way you normally would on that system.

Thank you nabber00, I am going to look into this soon.

@jamesl:

What I really want to do is to access my mails from the web. Any recommendations on the software I should use?
I use SquirrelMail for my web mail. SquirrelMail needs an IMAP server - I use Dovecot, which also serves all my other IMAP and POP needs.

and Dovecot also integrates back into Postfix to provide SASL (what Postfix uses to auth users trying to send mail) quite nicely

> I use SquirrelMail for my web mail. SquirrelMail needs an IMAP server - I use Dovecot, which also serves all my other IMAP and POP needs.
> and Dovecot also integrates back into Postfix to provide SASL (what Postfix uses to auth users trying to send mail) quite nicely

I use this same setup, works nicely.

@pclissold:

@jamesl:

What I really want to do is to access my mails from the web. Any recommendations on the software I should use?
I use SquirrelMail for my web mail. SquirrelMail needs an IMAP server - I use Dovecot, which also serves all my other IMAP and POP needs.

I use RoundCube mail and wu-imapd (with a patch I wrote to report spam/ham to spamassassin). RC's interface is far more modern/slicker than squirrel mail, although it's still lacking in terms of plugins.

You can use both webmail clients on the same server if you want to try things out. Just install them to different directories.

I installed dovecot and squirrelmail yesterday and so far so good. I agree that RoundCube's interface is way better looking than squirrelmail's but it seems too new (2 year?) for me to trust it with my emails. Anyways, thank a lot folks. Your advice has been very helpful!

I've been using roundcube for some time and i don't think you should be put off because it is still young. It's a very nice system, and as it matures I am sure they will improve the plugin API and more people will write more useful plugins. (I'm thinking of creating one myself to integrate some basic functionality of postfixadmin into it.)

I certainly wouldn't worry about trusting it with your email because the stable release is very solid, and compared to squirrelmail the UI is a dream.

BTW, if you're hosting lots of domains and users, then a system like postfixadmin to store your virtual maps and aliases in a database would make life much easier for you. There are some good guides at howtoforge for setting it up. If you only have a few domains and mailboxes it's probably not worth it though.

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