DirectAdmin allow you to configure email received by putting those spam detection message. OR rewrite the subject, OR put into the spam folder. Here, we will explain the options one by one:
1. Where do you the spam to go?
Inbox (dont’ block it) – you can direct the spam to the inbox as there might be false positive where you need to recheck all those incoming mail
Redirect it to the catch-all spam folder in your main imap account. – if you already set up a spam folder, you may redirect all the spam mail to the spam folder by choosing this option
Send the spam to the appropriate users’s spam folder. – for example if you already create a spam folder to store email from specific email address, you may select this option
Delete the spam – You may also choose to straight away delete the spam where we strongly encourage not to do so as there might be possibility where legitimate email has been tagged as spam
2. What score threshold do you wish to use?
The description explain it well, usually default setting is low threshold 5.0 and is recommended.
You may set custom threshold but please be cautious as the threshold might or might not block legitimate email
3. Would you like to delete high scoring spam?
You can set the spam score by deleting received email if the spam score match the integer you set
The second options was recommended with the false positive as reason
4. Do you wish to rewrite the subject of a spam email?
If you choose first option, the spam email received will have “***SPAM***” in front of the email subject. For example: ***SPAM***Fwd: Invoice Number.
For the second option, the email subject will not be changed.
5. How should the spam be delivered?
Attachments will seperate the spam into it’s own message, preventing scripts from being run. – if there’s an executable file in the spam email, it will not run if you have select this options
Text-only attachements are used for increased safety. – Attachments including images will not be shown. The email will display text only
For email blacklist and white-list , you may refer to the link: http://www.ipserverone.info/control-panel/how-to-setup-spamassassin-in-DirectAdmin