Difference between revisions of "Postfix Local Mail"

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[[Category:Networking (English)]]
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#REDIRECT [[Postfix]]
[[Category:HOWTOs (English)]]
 
 
 
==Postfix How To: Local Host-only mail delivery==
 
 
 
==What is postfix?==
 
Well, I think the postfix website gives a good enough definition for our purposes.
 
 
 
<pre>
 
"Postfix attempts to be fast, easy to administer, and secure, while at the same
 
time being sendmail compatible enough to not upset existing users. Thus, the
 
outside has a sendmail-ish flavor, but the inside is completely different."
 
-- http://www.postfix.org/
 
</pre>
 
 
 
==Goals==
 
The goal of this how to is to setup postfix for local mailbox delivery only.
 
 
 
===Required packages:===
 
*postfix
 
 
 
==Postfix Installation==
 
===Step 1: Install Postfix===
 
 
 
[root@computer]# pacman -Sy postfix
 
 
 
 
 
===Step 2: Check /etc/passwd, /etc/group===
 
Make sure that the following shows up in /etc/passwd
 
 
 
postfix:x:73:73::/var/spool/postfix:/bin/false
 
 
 
 
 
Make sure that the following shows up in /etc/group
 
 
 
postdrop:x:75:
 
postfix:x:73:
 
 
 
Note: Postfix can be made to run in a chroot. This document does not currently cover this. Might be added later.
 
 
 
==Postfix Configuration==
 
===Step 1: Edit /etc/postfix/main.cf===
 
The only things you need to change are as follows. Uncomment them and modify them to the specifics listed below. Everything else can be left as installed by pacman.
 
 
 
inet_interfaces = loopback-only
 
mynetworks_style = host
 
append_dot_mydomain = no
 
default_transport = error: Local delivery only!
 
 
 
If you want to control where the mail gets delivered and which mailbox format is to be used, you can do this by setting
 
home_mailbox = /some/path
 
or
 
mail_spool_directory some/path
 
''mail_spool_directory'' is an absolute path where all mail goes, while ''home_mailbox'' specifies a mailbox relative to the user's home directory. If the path ends with a slash ('/'), messages are stored in Maildir format (direcory tree, one message per file); if it doesn't, the mbox format is used (all mail in one file).
 
 
 
Examples:
 
mail_spool_directory = /var/mail  (1)
 
home_mailbox = Maildir/          (2)
 
1) All mail will be stored in /var/mail, mbox format
 
 
 
2) Mail will be saved in ~/Maildir, Maildir format
 
 
 
===Step 2: Edit /etc/rc.conf===
 
Add postfix to the daemons list. Make sure you put it after the network has started.
 
 
 
===Step 3: Edit /etc/postfix/aliases===
 
Namely, put a username in for the the following, substituting the correct username you desire (actual system account required) for USER
 
 
 
# Person who should get root's mail. Don't receive mail as root!
 
root:          USER
 
 
 
Run the following command. This creates the map file that postfix understands.
 
 
 
postalias /etc/postfix/aliases
 
 
 
In addition, create .forward in /root with the contents of the user you want to forward all root mail to:
 
eg USER@localhost
 
 
 
===Step 4: Start the daemon===
 
 
 
postfix check
 
 
 
If '''postfix check''' returns no errors, then start the daemon.
 
 
 
/etc/rc.d/postfix start
 
 
 
Check /var/log/mail.log for any errors.
 
 
 
===Step 5: Test===
 
Try sending an email. Even from yourself to yourself should be a good test.
 
 
 
mail -s test user
 
this is a test email.
 
.
 
 
 
Now check your mail using whatever client you desire.
 
 
 
===Step 6: Test some more!===
 
Make sure root mail forwards to the desired user; use the same test as above, but substitute root for user.
 

Latest revision as of 03:06, 14 November 2012

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