Exchange IMF - Blocking outbound mails :(

Posted on 2007-09-28
Medium Priority
Last Modified: 2008-01-09
I have several clients with setups that include Exchange server and also Backup Exec, the problem I am having is that the IMF on Exchange is blocking status mails that are being send from Backup Exec. Specificaly, client1 has the SCL set to 6 (Mark as junk if 6) and I receive the Backup Exec reports each day. Client2 has the SCL set to 5 (Mark as junk if 3) and the emails are being deleted on the way out. Is it possible to set the IMF to act on incoming mails only and ignore outgoing ones?
Question by:ScorpioUltima
  • 2
  • 2
LVL 104

Expert Comment

ID: 19981068
IMF does not do anything on outbound email. It doesn't touch outbound email. Therefore the messages are getting flagged when they come in to the server for delivery.

The way I usually get round this is to setup a second SMTP virtual server on the machine. This will need a second internal IP address. This second SMTP VS does not have IMF or anything else enabled on it. All internal systems are pointed at the second SMTP VS which do not go through any filtering.


Author Comment

ID: 19983239
Thanks for that, I have always thought that IMF worked on incoming mail only but it certainly seems to block it though, not sure if I can post a link here but I'll try...


Veritas is the email account that sends the mail, nick is the account (Mine) that receives it and as you can see the IMF deletes it on the way out! I have this EXACT problem with 2 seperate clients and yet other clients who also have the same Veritas/Exchange setup do not have the problem, the only thing in common between the sites that block is that the IMF is set to be more aggressive than the sites that do not block.

I'll try the 2nd server idea though, not something I have had to do before but I'll let you know how I get on.
LVL 104

Accepted Solution

Sembee earned 1500 total points
ID: 19983600
It is not deleting it on the way out. It is deleting it on the way in. That screenshot doesn't prove it is deleting it on the way out either.

When the application sends a message via an SMTP server the message has to go in and then comes straight back out again. I often refer to this as "bouncing" off the SMTP virtual server. It is the incoming part that IMF does its thing on.

Another thing you could is simply configure Veritas to send email via the ISPs SMTP Server instead of an internal server.


Author Comment

ID: 19984317
The screenshot wasn't meant to prove anything, it was just meant to show that mail that originated inside the network was being deleted on its way to an external address - IMF deletes it and therefore appears to be deleting outbound mail.

I'll look at both options you have suggested, seems a pity that Microsoft didn't include a 'safe senders' or 'safe domains' list and make IMF more configurable :(

Featured Post

A Cyber Security RX to Protect Your Organization

Join us on December 13th for a webinar to learn how medical providers can defend against malware with a cyber security "Rx" that supports a healthy technology adoption plan for every healthcare organization.

Question has a verified solution.

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

As much as Microsoft wants to kill off PST file support, just as they tried to do with public folders, there are still times when it is useful or downright necessary to export Exchange mailboxes to PST files. Thankfully, it is still possible to e…
There can be many situations demanding the conversion of Outlook OST files to PST format and as such, there is no shortage of automated tools to perform this conversion. However, what makes Stellar OST to PST converter stand above the rest? Let us e…
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…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Suggested Courses
Course of the Month16 days, 10 hours left to enroll

862 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