Re: Virtual domains help

[mouss]

Rupert Reid wrote:
Hello all,
I wan to set up an additional domain in postfix, whereby, to the outside 
world it is considered a separate and distinct postfix domain.  
Internally I have two separate unix accounts set up: unixmaindomain and 
unixadditionaldomain.  I want that all mail ([EMAIL PROTECTED], 
[EMAIL PROTECTED], etc...) for the additionaldomain to be delivered 
to the second unix account to be downloaded by my IMAP MTU account.

This is what I tried so far:-

1. mydestinations
•    All settings for main domain were left unchanged;
•     Added "additionaldomain.tld to mydestinations in main.cf;
•    Added  additionaldomain, comma separated, to RHS of 
etc/postfix/aliases: e.g. "admin: maindomain, additionaldomain"

The result
•    Continued to be able to send emails addressed from 
[EMAIL PROTECTED] and [EMAIL PROTECTED];
•    Continued ability to receive mail from 
[EMAIL PROTECTED];
•    However, could only receive mail to 
[EMAIL PROTECTED] (to the correct unix account).  All 
mail to other destinations (e.g. [EMAIL PROTECTED]) is bounced 
"User unknown in local recipient table".

Is there something additional I am meant to do to achieve what I want, 
or is it not possible using mydestinations


2.    Virtual alias domains
•    All settings for main domain were left unchanged;
•    removed all references to additionaldomain from main.cf
•    removed all references to additionaldomain from aliases file
•    postaliases hash...
•    Created virtual_alias_domains file containing: 
"additionaldomain.tld    2208081538"

do not put the domain both in virtual_alias_maps and in mydestination. 
chose one class.


    •    Postmap hash...
•    Created virtual_alias_maps file containing: 
"additionaldomain.tld    [EMAIL PROTECTED],
                                        [EMAIL PROTECTED],
                                        [EMAIL PROTECTED],
                                        [EMAIL PROTECTED],
                                        ... etc


so mail to
	[EMAIL PROTECTED] is delivered to the adresses that you 
put on the right hand. not what you want...

Please read the "TABLE SEARCH ORDER" in
        http://www.postfix.org/virtual.5.html

do see the "@" at the beginning of "@domain"?


also note that

- you can use virtual_alias_maps without putting the domain in 
virtual_alias_domains. virtual_alias_maps work for all domain.

- if the domain is a virtual alias domain, then its addresses must be 
mapped to another domain. otherwise, postfix does not know how to deliver.

- if mail is delivered via local (mydestination), the domain part is 
irrelevant at delivery time (so alias_maps do not distinguish between 
different domains). you need to map the addresses using virtual_alias_maps:

[EMAIL PROTECTED]       [EMAIL PROTECTED]
[EMAIL PROTECTED]       [EMAIL PROTECTED]
...

do not use wildcard aliases unless you want to accept all addresses 
(then you'll get a lot of spam).


    •    postmap hash...
•    Edited main.cf -  added:     virtual_alias_domains = 
hash:/etc/postfix/virtual_alias_domains
                        virtual_alias_maps = 
hash:/etc/postfix/virtual_alias_maps
•    Postfix reload

The result
•    Incoming mail rejected for all mapped users of additionaldomain.  
The mail failure error was:  User unknown in local recipient table

we only trust logs. so I ignore the "error" above.

•    The logs error read:
    Aug 22 22:41:05 rosario postfix/error[28924]: 09B862667D7: 
to=<[EMAIL PROTECTED]>, relay=none, delay=1, status=bounced 
(User unknown in virtual alias table)

the domain is listed as a virtual alias domain but the address is not 
found in virtual_alias_maps.

    Aug 22 22:41:05 rosario postfix/local[28926]: warning: database 
/etc/aliases.db is older than source file /etc/aliases

fix this. your postfix is using /etc/aliases while you think it should 
use /etc/postfix/aliases. check the values of alias_maps and 
alias_database using the postconf command.


Is there something additional I am meant to do to achieve what I want, 
or is it not possible using virtual alias domains


it is better to explain your goal without implementation details (forget 
about postfix for a few minutes and explain your goal in "functional" 
terms). If I understand correctly, you want to add a domain named 
new.example and you want all mail to this domain to go to the "newuser" 
account. if so,

- add
new.example somestring
to virtual_alias_domains

- put
[EMAIL PROTECTED]       [EMAIL PROTECTED]
[EMAIL PROTECTED]       [EMAIL PROTECTED]
[EMAIL PROTECTED]       [EMAIL PROTECTED]
in your virtual_alias_maps. here, example.com is any domain listed in 
mydestination. you can use "newuser" without a domain part, but you may 
have problems if you play with myorigin. so it is safer to put the 
domain part explicitely (or at least, make sure that $myorigin is listed 
under mydestination).

if you want delivery to multiple accounts, adjust as needed.

if you uncomment the "#new.example" catchall line, all 
[EMAIL PROTECTED] addresses will be accepted, so you will get a lot of 
spam. I wouldn't do this, but it's up to you.

Note that the "target" addresses (the addresses to which mail is 
forwarded) are not in a virtual alias domain. they are in a local domain 
(domain in mydestination). The idea is that after virtual alias 
expansion (this is recursive. see the docs), postfix must know how to 
deliver the address (either deliver to a mailbox, or pass the message to 
another MTA).



3.    Virtual Mailbox domains
•    was about to try this alternative but decided to stop and ask for 
help.
•    Please help!

Best Regards
Rupert