Can someone explain to me in more detail how the Junk Filters are implemented?
The reason I ask is that I'm observing some odd behavior which I can't quite explain, so hopefully someone can explain for me.
Here's the story:
I have only a few email addresses set up on my account, including one for myself and one for my dad.
I wanted to set up the DreamHost "Junk Filter" for my dad's account, but not for my account (I'm using another mechanism to sort my spam). However, both our email address were on the same domain.
So, here was my solution:
I created a new subdomain, filtered.origdomain.com (where origdomain.com was my original domain name). I turned on "Junk Filtering" for this subdomain but not the top domain.
I then created a new shell account for my dad, and created a new email address "email@example.com", and set up his old address to forward all mail to this new address (as well as store the mail as a backup in his old account). I figured I would test this setup by comparing the old account to the new account to see how the junk filter is working.
Here's the odd part:
So far nothing has been deposited in the "Junk Mail" folder in Webmail. In addition, things have been disappearing from the old account, not the new account, the one on which I enabled the Junk Filter! I've checked the old webmail, and there is no "Junk Mail" folder there, and I know "Junk Filtering" is not enabled for the original domain.
I can't think of a good reason that mail would arrive on the new, filtered account, but not at the old, unfiltered account. The most commonly blocked messages have been messages that my dad periodically gets from eBay about saved searches, so I know they are being sent to the original address, and they should be arriving at both accounts.
Can anybody explain what is happening and how I can fix it? If I get no replies here, I'll ask support.