[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

Create Catch-all account for Exchange 2007

Posted on 2009-07-09
8
Medium Priority
?
646 Views
Last Modified: 2012-06-27
I am trying to create a catchall account for Exchange 2007. I read where I had to disable Recipient Filtering on the EDGE server and create a Transport Rule. By doing this I was catching all emails coming in for the company.

All I want to do is catch emails sent to my domain BUT the mailbox name does not exist. (e.g. Bob Smith's email is bsmith@mydomain.com will go right to his inbox but if a message is sent to bobsmith@mydomain.com then have it sent to the catcall account)
0
Comment
Question by:GMSMRM
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 58

Accepted Solution

by:
tigermatt earned 1600 total points
ID: 24818216

Why?
A catch-all account will cause you nothing but problems. It has an administrative overhead to check that mailbox - any email sent to a wrong address will still be accepted, so someone must check that email and process it accordingly.
A catch-all account will also act as a massive spam and virus trap. It is common for abandoners to try simple addresses - e.g. bob@yourdomain.com. All the addresses on their list will be accepted by the server and delivered to the catch-all.

A better solution would be to leave all the standard anti-spam features enabled. This means any email to users who do not exist on the network will automatically be rejected, and an NDR sent to the sender by their mail server. The sender will then know IMMEDIATELY that their message failed, and will take corrective action to ensure it reaches the intended recipient the second time.

Having taken that on board, if you still need a catch-all mailbox, the procedure is at http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/c8fba4d7-4ddb-40ec-b77e-d198da86173f. If you don't have an Edge server, Recipient Filtering is disabled on the Hub Transport server instead.

-Matt
0
 
LVL 6

Expert Comment

by:muzzi_in
ID: 24818350
Are you sure you are configuring the Transport rule for catch-all on Edge server, because it wont work on HUB as it does categorization.

You can follow the link
http://technet.microsoft.com/en-us/library/bb691132.aspx
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 24818358
I could not agree more with tigermatt's comments.
Purely on a statistical basis - 97% of all emails are spam (http://news.bbc.co.uk/1/hi/technology/7988579.stm)
So for every 100 good messages your company gets a day, with a catch-all account, you are going to get on average 3,333 spam messages per day.
Over the course of a year, that equates to 1,216,666 messages that are spam.
Do you really want to look through all that for the ocassional message that might be worth reading?
0
Learn Veeam advantages over legacy backup

Every day, more and more legacy backup customers switch to Veeam. Technologies designed for the client-server era cannot restore any IT service running in the hybrid cloud within seconds. Learn top Veeam advantages over legacy backup and get Veeam for the price of your renewal

 
LVL 58

Expert Comment

by:tigermatt
ID: 24818383

To echo Alan's point, consider the disk I/O load that will place the server under. Those emails have to be committed to transaction logs and then to the databases. If you get a sudden burst of spam, you could bring the server to its knees as transaction logs fill the disk.

Email should always be rejected AS SOON as you can tell something is wrong with it. With recipient filtering enabled, this means it is rejected as soon as the sending server mentions a recipient with the wrong email address. The actual email is never exchanged, so the only real load on the server for the spam email dropped this way is a little network activity.

-Matt
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 24818413
Good point - well made.
0
 

Author Comment

by:GMSMRM
ID: 24841398
I followed the procedure for creating the catch-all account as suggested, but not suggested, and it works great. However I do consistenatly get emails for employees who are no longer with the company. I added a transport rule to try and drop them but it does not seem to work. Is the catch-all settings overriding this rule?
0
 
LVL 76

Assisted Solution

by:Alan Hardisty
Alan Hardisty earned 400 total points
ID: 24841430
A catch-all is simply that - a catch-ALL.
You will receive ALL mail destined to your server no matter what.  Nothing you can do about the old users.
0
 

Author Closing Comment

by:GMSMRM
ID: 31601821
Thank you for your fast and clear answers.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you looking for the options available for exporting EDB files to PST? You may be confused as they are different in different Exchange versions. Here, I will discuss some options available.
If something goes wrong with Exchange, your IT resources are in trouble.All Exchange server migration processes are not designed to be identical and though migrating email from on-premises Exchange mailbox to Cloud’s Office 365 is relatively simple…
In this video we show how to create a Contact in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Contact ta…
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…
Suggested Courses

649 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question