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QuestionSetting different message size limits to receive or send mail

  • Tuesday, November 03, 2009 6:34 PMJordi Puig Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Hi,

    It's someting strange what is happening to me with message size limits with Exchange.

    If I set a limit of 15MB to receive email and a limit of 5MB to send it, I cannot receive messages that exceed 5MB. But if I grow up the send limit to 15MB, I can receive all mails >=15MB.

    I post my configuration, so hope somebody can give me a solution:

    get-TransportConfig MaxReceiveSize -> 15MB
    get-TransportConfig MaxSendSize -> 5MB

    Receive Connector has 15MB as "Maximum message size (KB)" (Under Server Config>Hub Transport>Receive Connector>Properties>General tab)
    Send Connector has 15MB as "Maximum message size (KB) (Under Organiz. Config>Hub Transport>Send Connectors> Send Connector>Properties>General tab)

    Mailboxes has no limits under (Recipients>Mailbox>Properties>Mail Flow>Message Size Restrictions option)

    I have the Exchange version 08.02.0176.002 (SP2) clean installed (not migrating from any old version).


    Thanks for your time.
    Jordi Puig
     

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  • Tuesday, November 03, 2009 7:22 PMAndy DavidMVPUsers MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Traditionally, the global send and receive limits for an org should be the same as Exchange will use the lower value of the two.
     
  • Wednesday, November 04, 2009 8:14 AMJordi Puig Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    If it is like you say, why Exchange ask me for a "SEND LIMIT" and a "RECEIVE LIMIT"?

    I think this is a very useful feature, because I would want to limit my users send messages limit (in order to not overload the server), and set a much more high limit for receive messages (to not to loose that information from thirds).

    If Exchange don't have the ability to do that, there is any 3rd party software to do that?


    Thanks.
     
  • Wednesday, November 04, 2009 2:08 PMAndy DavidMVPUsers MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Well, honestly, if your server can handle 15MB messages that are sent to users, why cant it handle 15MB messages they send? Using the same limit for the global settings makes alot of sense. 

    That being said, you could always set the message size limit at the mailbox level as well for everyone very easily with a powershell command and the

    MaxSendSize switch


    http://technet.microsoft.com/en-us/library/bb124345.aspx

    http://technet.microsoft.com/en-us/library/bb123981.aspx
    Set-Mailbox


     

     
  • Sunday, November 15, 2009 4:23 AMKiran Ramesh Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Hi,

    I would like to add couple of views here, There is not harm in increasing the Max Send or recieve limit. Our Organization Globally have a Max Send set to 25mb & Max recieve as 25Mb. With 2 lakh plus mailboxes globally.

    In the main posting, Though I could not see any point of High Availability. If you have a CCR  or LCR running. Then you would have to set the Transport Dumpster one & half times the size of your Max-Recieve limit configured org wide.

    I agree with Andy David, As to when we monitored mail traffic using Exchange Built in Tools. Most of the mails sent were internal. Less than 25% were internet bound mails.

    Discripency in the Send/Recieve limit. Would require a lot of Fire Fighting in the transport level as the lesser one takes the weightage.

    Regards
    Kiran