KB06082101 Messages returned marked 'Blacklisted'Blacklisted Problems
1). Blacklisted
If you are getting email returned to you marked 'Blacklisted' remember that your organization's Senders must either be within the LAN as defined at Options | Server*, to be able to send mail through Mailtraq. If not you will see messages similar to:
The following recipient(s) could not be reached:
Jane Doe on 8/25/2008 8:17 AM
554 blacklisted (jsmith@domain.com)
In this example John Smith (jsmith) was sending email from a machine that was not included in the LAN definition for (domain.com) and so the message he was tying to send to Jane Doe was rejected by Mailtraq.
So - make sure your LAN definition correctly describes your local area network, and the IP addresses your Users will be connecting from. Read how here ...
2). Blacklisted, Relay Access Denied or 554 and other 500's messages -
If you are having unexpected problems with Users being Blacklisted by Mailtraq (for example, users in your domain but who are outside the LAN), or are getting '554 - Relay Access Denied' or other 550s messages you may need to adjust the Black List properties of the SMTP service.
 These dialogs, accessed from the SMTP Properties dialog Black Lists Tab, by clicking on the [Explicit Black Lists] button, enable the Black Listing facilities to be configured for each instance of the SMTP Service.
Open the Mailtraq Console,
Select Options from the top-menu,
Then select Services, and when the Service Manager opens,
Select the SMTP Service, and click the Properties button.
The SMTP Service Properties dialog will open.
Select the Blacklists-tab
Click on the [Explicit Black Lists] button
When the 'Black List' dialog opens, you will need to select first the Senders-tab (see below left) and then the HELO Hosts-tab (see below right).
Senders-tab
Uncheck
[ ] Reject non-local senders claiming to be local
HELO Hosts-tab
Uncheck
[ ] Reject remote clients ... Using local HELO arguments
 
These default settings are in place as another layer of protection to reduce the amount of spam your mail system receives. Removing the checks from the boxes will solve the blacklist problem, and should not significantly increase the amount of spam, provided you are using other anti-spam measures.
Exceptions - Explicit White List
*You can also decide whether to White List certain IP Address Ranges, Senders, Recipients or HELO Hosts at the [Exceptions (White List)] button in the dialog above.
Configuration Tips:
Controlled Relaying see KB05111702 Allowing controlled Relaying when you need to allow a user who is outside your LAN to send mail via Mailtraq, without becoming an 'open-relay'.
General Relay configuration is described here ...
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