Mark as Spam I think left a long time ago as it never worked. They now have Block Sender which is a 50/50 hit when they come in. This is what you should use. 

I used it daily to move things out of my inbox, to the junk filter and it was my impression it interfaced with Spam Assassin, helping it to flag stuff as spam.

Not anymore... we used it too, to train our gateways long ago...

So why am I paying for upgrades when they take useful features away?

If i remember correctly, Mark as spam was used to tell the bayes engine to learn the message as SPAM.

However bayes was removed long time ago in the product.

Still it would be really useful to have it back and configurable, for example, configure it as "move the message to spam folder" and the ability to trigger a custom script on that particular message.

When you choose Block Sender it moves to the junk email if I remember correctly.

If you are in Junk Email and choose Trust Sender it moves it to the Inbox.

Correct, but it doesnt do anything to where we can flag emails as spam/ham and train the gateways.

Like I said, I assumed it was helping train Spam Assassin. If it wasn't it should have been.

I'll follow-up with this thread to request that "Mark as Spam" be re-added to the web interface.

The main reason is that users are familiar with this feature. Nearly every email client and webmail system has it. So it's expected in Email just like a Reply button.

Even if the only thing 'Mark as Spam' does is move the message to Spam folder, it's still useful because:

Thanks,

Kevin

Ill still sell my soul for this... Mark as Spam that moves a copy of the email to a spam folder on the file system and the Junk E-Mail folder in SM, Mark as Clean(or Safe) that moves email to a ham folder on the file system and moves the email to the user's inbox, this would greatly improve our training of our anti-spam gateways.

Speaking of anti-spam gateways, we've been using rSpamD now for just over a month and it has been a glorious experience.

Right now, we have users reporting ham/spam emails to us via tickets, which is a pain when we could automate this easily (and have in the past, until this feature was removed).

Hi all!

It would be great to have a button "Mark as SPAM" that move that message to SPAM folder, even if there's no training to spam filters.

It even would be great to have an integration of that button to an external spam solution like rSpamD and SpamAssassin (or others, the more the best)