Postfix : restricting specific domain for specific user - linux

I am new to postfix . How can I blacklist specific domain for specific user using restriction class or by some other method.
Suppose my machine has two users - user1 and user2.
I want to blacklist or block the mails from abc.com to user1#mydomain whereas user2#mydomain.com can receive.
Similarly xyz.com should be blocked for user2#mydomain.com whereas user1#mydomain.com can receive.
Thanks in advance.

You can use restrictions class.
In main.cf, define your class like this:
smtpd_restriction_classes = ... ban_abc_com
ban_abc_com = check_sender_access hash:/etc/postfix/ban_adc_com, permit
The ban_adc_com file will contain:
adc.com REJECT
Then create a file table named protected_destinations containing:
user1#mydomain ban_abc_com
Then link all together in main.cf:
smtpd_recipient_restrictions = ..., check_recipient_access hash:/etc/postfix/protected_destinations
For user2, create a new class similar to ban_adc_com, then add in protected_destinations a new line containing:
user2#mydomain ban_xyz_com
You can see more here: Postfix restriction classes

Related

How to set a `User cap` for a particular domain in Gitlab

Original question:
I want to limit the number of users from a particular domain that can register into my Gitlab instance. I noticed that I could set a "user cap", but it wasn't specific to a domain.
For example:
I want to limit the number of users registered from these domains. 20 users from testdomain1.com and 30 users from testdomain2.com are allowed to sign up. So, if there are already 20 users registered sucessfully from testdomain1.com, new user from testdomain1.com will not be allowed to sign up.
What should I do for it?
2021.11.18 Edited:
I added a validate to the User model:
# gitlab/app/models/user.rb
class User < ApplicationRecord
# ...
validate :email_domain, :ensure_user_email_count
# ...
def email_domain
email_domain = /\#.*?$/.match(email)[0]
email_domain
end
def ensure_user_email_count
# select count(*) from users where email like '%#test.com';
if User.where("email LIKE ?", "%#{email_domain}" ).count >= 30
errors.add(email_domain, _('already has 30 registered email.'))
end
end
end
This validate can set "user cap = 30" for each domain but it's still not able to set a "User cap" for a particular domain.
Since the related issue post did not get any response yet. I'm tring to implement it by myself. And it seems like that I need to extend the UI of the Admin Settings page and add some related tables to database to set different "user cap" for different email domain.
The GitLab user cap seems to be per GitLab instance.
So if both your domains are reference the same GitLab instance, you would have only one user cap possible.
But if each of your domain redirects to one autonomous GitLab instance (per domain), then you should be able to set user cap per domain.
The OP Ann Lin has created the issue 345557 to follow that feature request.
TRhe OP reports:
A particular table is needed to store the caps.
But I don’t have enough time now to modify the UI so I found a simple way to do this:
The Allowed domains for sign-ups which called domain_allowlist in database is a text:
gitlabhq_production=# \d application_settings
...
domain_allowlist | text | | |
...
gitlabhq_production=# select domain_allowlist from >application_settings;
domain_allowlist
-------------------
--- +
- testdomain1.com+
- testdomain2.com+
(1 row)
I can modify the testdomain1.com to testdomain1.com#30 to store the user cap and use Regex to get the number 30.
I will modify the UI and add the database table later. And I’ll create a pull request on Gitlab when I’m done.

django-viewflow, multiple flows within the same app causes url not unique via #rest.register

Say I have an app called 'MRT`, inside the app I have 2 flow definitions.
Flow_A and Flow_B
both registered via #rest.register as below:
#frontend.register
#rest.register
class Flow_A(Flow):
....
#frontend.register
#rest.register
class Flow_B(Flow):
....
When I runserver, it raises warning: ?: (urls.W005) URL namespace 'viewflow_rest:mrt' isn't unique. You may not be able to reverse all URLs in this namespace
The consequences of this is that causing tasks of one of the flow(depends on which one registered last) cannot be url reversed. eg. Reverse for 'check_size__detail' not found. 'check_size__detail' is not a valid view function or pattern name.
Issue has been rectified in v1.5.11
see github ticket

[13.5.2]Create DataStore through ssoadm.jsp -> Atttribut dont match with 'service schema'

I want to create a DataSore through ssoadm.jsp because I use endpoint url in order to automatize process of configuration.
[localhost]/ssoadm.jsp?cmd=create-datastore
I put:
domain name (previously created with default coniguration): myDomain
data store name: myDataStore
type of DataStore: LDAPv3
Attribut values: LDAPv3=org.forgerock.openam.idrepo.ldap.DJLDAPv3Repo
Then I got something like: Attribute name "LDAPv3" doesn't match with service schema. What am I supposed to put in those fields "Attribut values" pls? An example is given:
"sunIdRepoClass=com.sun.identity.idm.plugins.files.FilesRepo"
PS: I dont want to create datastore from [Localhost]/realm/IDRepoSelectType because there is jato.pageSession that i can't automaticly get.
PS2: it is my first time asking a question on Stackoverflow, sorry if my question didn't fit with the expectation. I tried my best.
ssoadm.jsp?cmd=list-datastore-types
shows the list of user data store types
Every user data store type has specific attributes to be set. Unfortunately those are not explicitly documented. The service attributes are defined in the related service definition XML template, which is loaded (after potential tag swapping) into the OpenAM configuration data store during initial configuration. For the user data stores you can find them in OPENAM_CONFIGURATION_DIRECTORY/template/xml/idRepoService.xml
E.g. for user data store type LDAPv3 the following service attributes are defined
sunIdRepoClass
sunIdRepoAttributeMapping
sunIdRepoSupportedOperations
sun-idrepo-ldapv3-ldapv3Generic
sun-idrepo-ldapv3-config-ldap-server
sun-idrepo-ldapv3-config-authid
sun-idrepo-ldapv3-config-authpw
openam-idrepo-ldapv3-heartbeat-interval
openam-idrepo-ldapv3-heartbeat-timeunit
sun-idrepo-ldapv3-config-organization_name
sun-idrepo-ldapv3-config-connection-mode
sun-idrepo-ldapv3-config-connection_pool_min_size
sun-idrepo-ldapv3-config-connection_pool_max_size
sun-idrepo-ldapv3-config-max-result
sun-idrepo-ldapv3-config-time-limit
sun-idrepo-ldapv3-config-search-scope
sun-idrepo-ldapv3-config-users-search-attribute
sun-idrepo-ldapv3-config-users-search-filter
sun-idrepo-ldapv3-config-user-objectclass
sun-idrepo-ldapv3-config-user-attributes
sun-idrepo-ldapv3-config-createuser-attr-mapping
sun-idrepo-ldapv3-config-isactive
sun-idrepo-ldapv3-config-active
sun-idrepo-ldapv3-config-inactive
sun-idrepo-ldapv3-config-groups-search-attribute
sun-idrepo-ldapv3-config-groups-search-filter
sun-idrepo-ldapv3-config-group-container-name
sun-idrepo-ldapv3-config-group-container-value
sun-idrepo-ldapv3-config-group-objectclass
sun-idrepo-ldapv3-config-group-attributes
sun-idrepo-ldapv3-config-memberof
sun-idrepo-ldapv3-config-uniquemember
sun-idrepo-ldapv3-config-memberurl
sun-idrepo-ldapv3-config-dftgroupmember
sun-idrepo-ldapv3-config-roles-search-attribute
sun-idrepo-ldapv3-config-roles-search-filter
sun-idrepo-ldapv3-config-role-search-scope
sun-idrepo-ldapv3-config-role-objectclass
sun-idrepo-ldapv3-config-filterrole-objectclass
sun-idrepo-ldapv3-config-filterrole-attributes
sun-idrepo-ldapv3-config-nsrole
sun-idrepo-ldapv3-config-nsroledn
sun-idrepo-ldapv3-config-nsrolefilter
sun-idrepo-ldapv3-config-people-container-name
sun-idrepo-ldapv3-config-people-container-value
sun-idrepo-ldapv3-config-auth-naming-attr
sun-idrepo-ldapv3-config-psearchbase
sun-idrepo-ldapv3-config-psearch-filter
sun-idrepo-ldapv3-config-psearch-scope
com.iplanet.am.ldap.connection.delay.between.retries
sun-idrepo-ldapv3-config-service-attributes
sun-idrepo-ldapv3-dncache-enabled
sun-idrepo-ldapv3-dncache-size
openam-idrepo-ldapv3-behera-support-enabled
It might be best that you create an user data store instance via console and then use ssoadm.jsp?cmd=show-datastore to list the properties. You would get a long list of attriutes ... to much to show here.
When you create the data store, make sure you specify the password for the bind DN using property
sun-idrepo-ldapv3-config-authpw=PASSWORD

Postfix and save to sent mail dir

I know this might be a dummy question or a question that comes from lack of knowledge, but I hope someone can still answer it. I did try to read a lot of Postfix documentation but found no answer to this. I don't even know if it's a Postfix specific or mail servers general question.
So I have a mail server, just a clean Postfix install that delivers email.
I've defined my users and connected with IMAP and SMTP using Thunderbird.
When I went to Thunderbird account settings and disabled "place a copy", Postfix did not put a copy of the sent message in the user .Sent folder.
However, I've also connected my Gmail, Hotmail or Yahoo mail and disabled the "place a copy" and still have a copy in the sent items folder.
So in this case there are 2 options:
Something is wrong with my Postfix configuration
Gmail, Hotmail, Yahoo put a copy in their sent folder as a different process on the server side
Just for the record, having searched around for a how to, and not finding one, I am posting it here:
The only (easy) way I've found to save sent emails is the sender_bcc solution (with it's attendant faults):
I am using postfix / dovecot / sieve / mysql virtual boxes
In /etc/postfix/main.cf add:
sender_bcc_maps = mysql:/etc/postfix/mysql-virtual-bcc-maps.cf
Create file /etc/postfix/mysql-virtual-bcc-maps.cf:
user = (database user)
password = (database password)
hosts = 127.0.0.1
dbname = (database databasename)
query = SELECT CONCAT_WS('',LEFT('%s', LOCATE('#', '%s')-1),'+sent#',SUBSTRING('%s', LOCATE('#', '%s')+1)) AS destination FROM virtual_users WHERE email='%s' AND autosent=1
You'll note in my query, I've added a (tinyint default 0) column to my virtual_users table so I can turn on/off this automatic sent items feature per user. This query takes the sender email address that postfix gives it, splits it in half at the # sign, and adds +sent to the address so it looks like sender+sent#domain.tld. This allows sieve in the next step to pick it up and drop it straight to sent items.
In /etc/dovecot/sieve/default.sieve add:
require ["fileinto", "mailbox", "envelope", "subaddress","imap4flags"];
if envelope :detail "to" "sent" {
addflag "\\Seen";
fileinto :create "Sent";
stop;
}
Also helpful to modify /etc/dovecot/conf.d/15-mailboxes.conf and add the auto subscribe to sent (and junk and trash and others for that matter):
mailbox Sent {
special_use = \Sent
auto = subscribe
}
I think that is all (I'm posting this the next day after doing it, so I think I got it all...)
Postfix itself does not place copies of sent messages anywhere; it receives messages and delivers them to the recipient. Saving sent messages to your own mailbox is the responsibility of your user agent (Thunderbird, in your case).
It's important to understand that Postfix (and other traditional Unix SMTP servers) don't have a "user" concept. Yes, if so configured it's possible to authenticate by supplying a username and a password, but Postfix doesn't use this identity information.
That said, it's not impossible to configure Postfix to do what you expected – sender_bcc_maps can be used to add a recipient to messages sent by you, and by adding yourself and using a filter in your mail client (or mail delivery agent like procmail) you can make sure that messages sent by you end up in the Sent folder.
I am running a Installation with automatic copies created by sender_bcc_maps. It's working fine. You have to check the sender, otherwise everyone can create sent mails in foreign sent folders.
I have solved it with two virtual domains. One for the user and one for the copy.
But there is a big problem with sender_bcc_maps. All bcc senders will be deleted in the sent copy. You cannot see anymore, who got a blind copy of this mail.
As 'ego2dot0' said above, you don't need any MDA filters (sieve etc.) to do this. It can be done using Postfix alone, although it took me a while to figure out how to do it.
You have to use sender_bcc_maps AND virtual_mailbox_maps features together.
You have to use a virtual domain dedicated specially for copies to self. If your actual domain is "your.domain.tld", you can use eg. subdomain "copyself.your.domain.tld". This subdomain does not have to actually exist, ie. be defined in the DNS (moreover, it's better that it isn't defined, so nobody accidentally sends mail to it from outside). It is a purely virtual domain that is recognized only by Postfix.
1) Configure sender_bcc_maps to BCC mail coming from user#your.domain.tld to user#copyself.your.domain.tld. You can do it for only a few selected users using a regular "hash" type map, or you can do it for all users at once using PCRE type map and regular expressions.
2) You have to define your virtual domain in virtual_mailbox_domains, like this:
virtual_mailbox_domains=copyself.your.domain.tld
3) Configure virtual_mailbox_maps so that the destination mailbox for address "user#copyself.your.domain.tld" is the actual "Sent" mailbox of the user "user". For example (assumed that you are using regular system users and Maildir format - like in my case) the path to "Sent" mailbox for user "user" will be "/home/user/Maildir/.Sent". So, you can define common part of the path as virtual_mailbox_base, eg.
virtual_mailbox_base=/home
and then in the virtual mailbox map enter the rest of the path like this:
user#copyself.your.domain.tld user/Maildir/.Sent/
(the trailing / is important to indicate the Maildir format).
Again, you can use PCRE type map to do this for all users.
4) To properly save mail to the mailbox, Postfix need to also know the proper UID and GID for the particular user, so you have to use virtual_uid_maps and virtual_gid_maps parameters as well. If you are using virtual users, it's probably enough to define "static" type maps specifying a single UID and GID of the system user that owns all the virtual mailboxes. However, if you are using system users like me, you need the proper actual UID and GID for any user. If you have only a few users, you can use a regular "hash" type map, with entries like these:
user#copyself.your.domain.tld 2001
or you can try to setup a pipeline with "pipemap" map type, that uses some PCRE maps and "unix:passwd.byname" map to obtain the UIDs and GIDs for all users (I haven't done this part, as my Postfix installation is compiled without "pipemap" type support).
So to sum everything up, use something like this:
In /etc/postfix/main.cf file, add the following lines:
sender_bcc_maps=hash:/etc/postfix/sender_bcc
virtual_mailbox_domains=copyself.your.domain.tld
virtual_mailbox_base=/home
virtual_mailbox_maps=hash:/etc/postfix/copyself
virtual_uid_maps=hash:/etc/postfix/copyself_uids
virtual_gid_maps=hash:/etc/postfix/copyself_gids
/etc/postfix/sender_bcc contains a bunch of lines like:
user#your.domain.tld user#copyself.your.domain.tld
/etc/postfix/copyself contains - respectively - lines like:
user#copyself.your.domain.tld user/Maildir/.Sent/
/etc/postfix/copyself_uids and /etc/postfix/copyself_gids contain - respectively - lines like:
user#copyself.your.domain.tld 2001
I have done this on my server and it works great for me.

Load content by id using Drupal6 Rules module

Would like to add files to a Drupal6 user's account based upon certain conditions (basically just upon new account creation). I want to use the Rules module to accomplish this but the conditional items don't seem to cover this action. Probably if you select the "Execute Custom PHP code" it is possible, but this out of my programming league. Any ideas welcome.
mmmm ok maybe u will find creating a new module is something difficult but its very easy..lets do it
1- go to /sites/all/modules
2- create new folder called when_user_login (lets called our new module when_user_login)
3- create inside this folder when_user_login.info include the following code
name = when user login
description = this module do something when user login
core = 6.x
4- now lets create a new file in the same directory called when_user_login.module include the following code
/**
* Implementation of hook_user().
* #see http://api.drupal.org/api/drupal/developer--hooks--core.php/function/hook_user/6
* for more details
*/
function when_user_login_user($op, &$edit, &$account, $category = NULL) {
switch($op){
case 'insert' :
// now any code we will write here will be implemented when new user register
// you can access the new user information by {$account} variable
// E.g $account->uid include the id of the new account that register
break ;
}
}
good luck...hop that will help you (don't forget to enable the module)

Resources