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newbie questions regarding queues, recipient lookup, RAM requirements

Created: 30 Mar 2014 • Updated: 31 Mar 2014 | 2 comments
Kremlar's picture
This issue has been solved. See solution.

Working on implementing Symantec Messaging Gateway to provide some additional filtering to Exchange 2013 (small office).

I have 3 basic questions:

1 - I see the requirements state 4GB RAM.  How strict is this requirement?  Can it be run in a 2GB RAM for a small office?  What are the downsides of giving SMG too little RAM?  Slow message processing?  Anything else?

2 - If our Exchange server goes down, does the SMG queue up email being received until Exchange is back up?  If so, how much email can be queued?  Just disk-space limited?

3 - When using recipient lookup via our AD server, what happens if our AD server goes down or connectivity to our AD server is somehow impeded?  Are all emails rejected or do all emails pass through the recipient lookup filter?


Operating Systems:

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SMLatCST's picture

Here's my 2 pence worth wink

  1. I'm sure you've already seen these, but the 4GB mark represents the minimum requirements for the virtual SMG:
    Anything lower and it may not start at all/cause delays, and crucially mean you may not be able to get support from Symantec
  2. Bit of info about the queue behaviour can be found below (5 days max):
  3. In the event the LDAP source is unavailable, mail will be stored in the delivery queues and are subject to the limits described in point 2:
    However, you can just disable the lookup to get mail flowing again until the LDAP issues are resolved:
Swordfish83's picture

What happend with SMTP Tarpitting on Exchange 2013?, Recipient filtering is an anti-spam feature in Microsoft Exchange Server 2013, the Recipient filtering it's a similar feature on SMG.

If i use SMG as anti-spam:

  1. It's necessary disable this feature?
  2. These settings cause some delay on email delivery?

By default, tarpitting is configured for 5 seconds on Receive connectors, it's recommended set it to 0 seconds?