Hourly limits when mass mailing via Hub Transport Severs

Hi Everyone
I need to know what are the parameters to be configured on an Exchange 2007 Hub transport server for:
- Altering the amount of mails that can sent by an application on an hourly rate externally via SMTP (my organisation wishes to send 10000 mails every hour)
- each mail must have a maximum size of 270Kb
Does anybody know:
(1) What are the two values that can be modified on the Hub Transport server
(2) How can we monitor performance impact? particularly if we increase the hourly rate from say 10000 to 15000?
Many thanks in advance

Hi,
Based on my knowledge, there is no value in Transport server to limit the maximum number of emails sending outbound per hour. For more information about it, please refer to transport server limits part in the following article:
http://technet.microsoft.com/en-us/library/aa997166(v=exchg.80).aspx
Hub Transport Server Properties > Limits Tab (RTM)
http://technet.microsoft.com/en-us/library/bb629486(v=exchg.80).aspx
As for the max message size limits for all emails, there are some parameters to set it in global limits (Set-Transportconfig –maxreceivesize 270Kb –maxsendsize 270Kb),connector limits (MaxMessageSize in
Set-SendConnector cmdlet), server side limits (Set-TransportServer cmdlet)and user limits
(Set-Mailbox -Identity Janas –MaxSendSize
). For more information about Exchange 2007 Message Size Limits, please refer to:
http://www.msexchange.org/articles-tutorials/exchange-server-2007/management-administration/exchange-2007-message-size-limits.html
If you have any Exchange issue, please ask a question in Microsoft Exchange forum for more suggestions:
http://social.technet.microsoft.com/Forums/en-US/home?forum=exchangesvrgenerallegacy%2Cexchangesvrclientslegacy&filter=alltypes&sort=lastpostdesc
Regards,
Winnie Liang
TechNet Community Support

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