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disable Junk mail folder in outlook / exchange when we have an outside spam filtering service SBS 2011 and POP

Posted on 2014-04-25
Last Modified: 2014-05-02
2 different situations, same issue - mail is going into the junk mail folder but we are using an outside spam filtering service so we don't want outlook / exchange to put mail in the  junk mail folder.

On my mail account, I use POP and outlook 2010.  Mail goes through a spam filtering service.  Under junk mail settings in outlook, I have 'no automatic filtering'.  There are NO blocked senders and no mail rules to put things in the junk mail filter.

I still get things into the junk mail box. From senders that I get in the inbox also (again showing that it's not a blocked sender issue) and even when junk mail in outlook is set to no automatic filtering.

And along the same way, but more important - on an SBS 2011 / Exchange 2010 server, how do I turn off all junk mail filtering in Exchange and outlook since the outside spam filter should be catching the spam / junk?

Is there a way to turn off junk mail in outlook via group policy so I don't have to touch every machine?
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LVL 18

Accepted Solution

Andrew Davis earned 500 total points
ID: 40026487
On the SBS server,
open Exchange Management Console
In left pane goto [Microsoft Exchange] - [Microsoft Exchange On-Premises ...] - [Organisation Configuration] - [Hub Transport]
in the right pane goto the "Anti-spam" Tab
Disable all the filters Except "Recipient Filtering" (We dont want to become open relay).

Now In left pane goto [Microsoft Exchange] - [Microsoft Exchange On-Premises ...] - [Server Configuration] - [Hub Transport]
In the right pane at the bottom open the "Anti-spam" tab, and disable the The IP Lists. (unless you are using these to only allow your gateway filtering service to send messages to you.

Outlook also has its own anti-spam filtering at the client level, but you have said that you disabled that. double check.

Note** I prefer to have the Anti spam enabled at the client level as you usually have Gateway filters set to being on the light side. This is to stop the occurance of false positives. but this will depend on your environment and setup.

Also some antivirus solutions have a spam service in them that may be sending the messages to your spam folder.


Author Comment

ID: 40029487
Thanks. I did those steps on the server - all the entries - content filter, ip allow, ip allow list providers, etc are all disabled already - I think I was trying this some time ago.

That's on the domain machines.

I know on my workgroup PC using POP, there's no exchange in the mix (to have to be disabled) and the junk email options in outlook have the top button - no automatic Filtering is checked.  No safe senders or recipients, no blocked senders and nothing checked under the international tab.

And I still get mail in my junk mail folder, as do users in the domain.  We are all using GFI's managed Antivirus - a version of GFI  Vipre.  that doesn't have email filtering, if I am not mistaken.

any other thoughts?
LVL 18

Expert Comment

by:Andrew Davis
ID: 40029775
the only setting i can see is http://office.microsoft.com/en-au/outlook-help/change-the-level-of-protection-in-the-junk-email-filter-HP010356454.aspx

although it look like you have already done this.

Not sure why you would want to turn off junk filter all-together as i find it rarely finds false positives.

The only other thing i can think of is you may want to check the message header as it will may give you some idea if the message is being classified prior to the client receiving it.

Author Comment

ID: 40030467
thanks.  Check my username - I certainly defer to you and the other experts on the right way to do things.

But normally, with an outside spam / spooling service, when an email is sent to a user using Exchange & Outlook, there's 3 places that mail could get filtered, right ? the spam service, exchange's antispam and outlooks junk mail.

While I used to think that's great - 3 chances for spam to be stopped - you will have super clean email in your inbox, it really is more of an administrative headache?  3 places for legit mail to be blocked.  3 allow / block lists, 3 places to check / administer, right?

And outlook's junk mail settings seem the most troublesome? If I put someone on my block list on my home outlook, does that carry over to outlook at the office? Or the level of spam filtering - is that tied to the machine you are on? or because it's exchange, exchange keeps them in sync?  Can the home machine be set to high and office set to low and then if outlook is open on both machines, 1 machine, at high is putting more mail into the junk mail, but being exchange, the home machine sees this high level of filtering, etc.?

They were having issues with mail from info requests - their contact us page from their website going right into the junk mail folder.  Those were going through the spam filtering service because the website is hosted outside.

AND scans / emails from their canon copier in the office were doing the same thing - immediately going into the junk mail box for 2 different users (both who would get the info@.... mail)

I looked again at their junk mail settings and somehow they are set at Low, not off.  I cleaned out their allowed senders list and set it to no automatic filtering.  Now the mail from info@...  and canon@.... go into their inbox.

So back to the idea that exchange keeps junk mail settings in sync across machines using outlook for that account?  Will their home outlook also change to No filtering? Or I have to check that one also?

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