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Receiving emails with 6-10MB attachments

Posted on 2014-08-28
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We have conferences that require guest speakers and they send us their PowerPoint presentations via email.  Until recently this has not been an issue.  Most are less than 10MB in size and they are not zipped, usually.  Recently we are receiving them, we find out when the speaker calls and asks if we received there presentation.  Neither us, or the sender receive any notification that the email has not been delivered.  I have checked the spam filter attachment settings and it is set to forward attachments up to 200 MB in size. No changes have been made in Exchange, any ideas what I can check?
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Question by:David Newcomb
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dexIT earned 2000 total points
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I believe the default send/receive size it 10mb, if you've received anything larger it'd get rejected. You'll need to increase your size limit.

Global setting

This setting determines the maximum size of the messages in the Exchange 2000 organization; the messages can be incoming, outgoing, or internal.

To configure the global setting, follow these steps:
Start Exchange System Manager. To do this, click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
Expand Global Settings.
Right-click Message Delivery, and then click Properties.
Click the Default tab to configure the global settings.
Connector setting

The settings for each connector control the maximum size of outgoing messages that users can send through the connector.

To configure the connector settings, follow these steps:
Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
Expand Administrative Groups, and then expand Administrative Group Name, where Administrative Group Name is the name of your administrative group.
Expand Routing Groups, and then expand Routing Group Name, where Routing Group Name is the name of your routing group.
Expand Connectors, right-click the connector that you want to configure, and then click Properties.
On the Content Restrictions tab, under Allowed sizes, click to select the Only messages less than (KB) check box, and then type the size (in KB) that you want to permit.
SMTP virtual server setting

This setting determines the maximum size of a message that is permitted to pass through a virtual server. The virtual server advertises the limit by means of the Extended Simple Mail Transfer Protocol (ESMTP) SIZE command verb (RFC 1870).

Note The protocol size restriction is meant to reject messages on boundaries with other e-mail systems. These restrictions are effective for individual servers and should not be used as methods to limit the message size in an Exchange enterprise server group. Administrators can set the message delivery option in the global settings to limit and to control the message size restriction across an organization that uses Exchange 2000 or Exchange 2003. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
326154 The OAB does not replicate if you set a message size restriction at the transport level


To configure the Simple Mail Transfer Protocol (SMTP) virtual server setting, follow these steps:
Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
Expand Administrative Groups, and then expand Your Administrative Group Name, where Your Administrative Group Name is the name of your administrative group.
Expand Servers, and then expand Your Server Name, where Your Server Name is the name of your server.
Expand Protocols, and then expand the SMTP node.
Right-click SMTP Virtual Server Name, where SMTP Virtual Server Name is the name of your SMTP virtual server, and then click Properties.
Click the Messages tab to set the maximum size that you want to permit.
User mailbox setting

This setting determines the maximum size of a message that users can send or receive through their mailboxes. User mailbox settings are enforced by the information store instead of by the message categorizer. The information store prevents an oversized message from being sent to Transport if the message size exceeds the user mailbox maximum message size setting.

To configure an individual user's mailbox settings, follow these steps:
Start the Active Directory Users and Computers snap-in, and then locate the user account that you want to configure.
Right-click the user's account, and then click Properties.
Click the Exchange General tab, and then click Delivery Restrictions to set the maximum size that you want to permit.
Note The size of SMTP messages that are sent between routing groups and to the Internet increase by about 30 percent if they contain binary attachments or other 8-bit data.

Referenced from:
http://support.microsoft.com/kb/322679

supplemental reference:
http://exchangepedia.com/2007/09/exchange-server-2007-setting-message-size-limits.html
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