Do i need to restart the Exchange services after tweaking anti-spam rules or installing spam filter updates through windows update or does it automatically take effect?

I am running Exchange 2010 on a Windows 2008 R2 base server.

We have been getting a ton of spam from spoofed email domains and i enabled Sender ID filtering to prevent this but after i hit apply i still got some spoofed email a few minutes later and was wondering if i needed to restart the exchange services.
Blake WeaverIT DirectorAsked:
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They should take effect after you apply them. There should be no reason you'd have to restart any services.
Asif BacchusI.T. ConsultantCommented:
I usually like to restart the Transport Service, just to make sure things 'stick'.  This is a quick and easy service to restart, so you won't really have any downtime, etc.

As a side-note, double-check to make sure you enable Recipient Filtering and check the box "Block messages set to recipients that do not exist in the directory" in the "Blocked Recipients" tab.  This on it's own usually cuts your SPAM down dramatically.
Blake WeaverIT DirectorAuthor Commented:
Thanks Asifbaccus.  Yes i already have the checkbox checked(block messages set to recipients that do not exist in the directory) but i have still been getting spam from internal addresses which i cant understand.
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Asif BacchusI.T. ConsultantCommented:
Are you sure these emails are not actually originating from within your network?  Have you checked the headers on one of them to make sure?  Many trojans and malware infections setup a little mailserver on clients and then SPAM internally.  That way they get around Exchange SPAM checks.

If you have a firewall capable of monitoring and controlling outgoing connections, I usually setup a rule to prevent any source IP address from sending via port 25 except the Exchange server to avoid such problems.

Otherwise, you're right, SenderID may help you out.

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Blake WeaverIT DirectorAuthor Commented:
The second comment was a great thought but as soon as i implemented an external third party spam filter it caught all the spoofed address emails.
Asif BacchusI.T. ConsultantCommented:
Glad you got it all sorted out... SPAM is such a pain! Cheers.
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