Bulk emails holding up the mail queue

We have an Exchange 2007 server that handles all our emails very nicely.  However once a month we need to send out customer statements and at that point the exchange server is handed many hundreds of emails to process all at once.  This generally gives us a long list in the outgoing mail queue and means that regular email is held up while the statements are cleared.

Is there someway to configure the exchange server (or the Outlook client from which the statements are set) to give priority to the regular mail?  I don't want to statements to wait until "after hours" as it is important to get them out as soon as possible.

Thanks in advance.
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Skyler KincaidConnect With a Mentor Network/Systems EngineerCommented:
Have you been able to check the performance of the server during that time. Depending on the number of mailboxes you have 10GB is probably not enough. We typically have 16GB of RAM in any of our Exchange servers.

How many mailboxes are you managing? I bet if you looked at the RAM during the time of those emails going out that it will be maxed out.
Skyler KincaidNetwork/Systems EngineerCommented:
Do the statements have large attachments or what causes them to be different than normal mail? How much RAM does your email server have? Are you backups and log truncation happening normally?
vanderfieldAuthor Commented:
There is a PDF attachment to every statement email - typically about 100kb.  Server memory is 10GB, and yes the logs are being truncated at each successful backup.
vanderfieldAuthor Commented:
Memory was indeed the problem.  Thanks for your help.
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