Message size limit in Exchange 2007

All:

My customer has a Exchange 2003 Server (SBS) using Outlook 2003 clients. My customer sends out newletters to current and former customers to the tune of 30K or so on a monthly basis. In the 2003  products, the way I understand it, there is a limit as to the overall size of an individual e-mail task that gets sent out. Such as: An e-mail sent to individuals from am Outlook contact list would allow fewer recipients than just sending to straight e-mail addresses due to the fact that the Outlook contacts add extra size to an e-mail sending task than does using e-mail address. My customer, can send his monthly e-mail to about 5000 recipients at a time just pasting the e-mail address in the Bcc: field. However if he uses Outlook Contacts, he can only send the same e-mail to 250-500 in one shot. This is my understading of the limitis in the 2003 products. Make sense?

My question is: Do these limits also exist in the 2007 Exchange/Outlook products or have they been in creased or eliminated?

Thanks.
mattk-tcwAsked:
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Andres PeralesConnect With a Mentor Commented:
My understanding is that MS has changed the way Exchange 2007 handles DL (distro lists)...in Exchange 2003 one DL equalled the number of users in the DL.  In Exchange 2007 one DL equals one address, so the way that I understand it is if a user has a DL with thousands of users and he sends to that one DL it will be just like sending to one receipient.
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mattk-tcwAuthor Commented:
Additional info:

When he pastes e-mail address into the Bcc: field, the last address in the list is a partial address because it is cut off. the number of address he is attempting to paste is greater than the number pasted. It appears as thought there is a character limit to this filed in Outlook.
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mattk-tcwAuthor Commented:
Thanks to peralesa for the ONLY response. Did I catch eveyone on vacation? :)

It seems like it is a character limitation in the Outlook field. Can anyone confirm this and tell me if this has been improved in Outlook 2007?

Matt
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