By default, Microsoft Exchange Servers will only accept 10Mb e-mails attachments and here below are some of the settings I change if a organization require higher receive size limits, this is for a single server setup.
The message size limits on the organization level are set through the Exchange Management Console by browsing to:
Organization Configuration > Hub Transport > Global Settings
then double click on the default transport settings
These are the default settings
To set the default send/receive limits to 50Mb please change Maximum Receive and send size to 51200 (KB)
You can also configure these settings using the EMS
Set-TransportConfig –MaxReceiveSize 50MB –MaxSendSize 50MB
<<<<<<<<<< —————->>>>>>>>>>
The message size limits on the send connector can be set through the EMC
Organization Configuration > Hub Transport > Send Connectors
Then double click the Send Connector:
These are the default settings
You can also configure these settings using the EMS
Set-SendConnector –Identity Internet –MaxMessageSize 50MB
<<<<<<<<<< —————->>>>>>>>>>
The message size limits of the receive connector can be set through the EMC
Server Configuration > Hub Transport
Then double click the Receive Connector in the Receive Connectors pane:
These are the default settings
You can also configure these settings using the EMS
Set-ReceiveConnector –Identity “MAIL1\Default MAIL1” –MaxMessageSize 25MB
<<<<<<<<<< —————->>>>>>>>>>
You could also put limits to the MaxReceiveSize and MaxSendSize values for one mailbox users, mail-enabled contacts or a distribution groups but by default no limits are imposed.
To view the settings for a mailbox user, navigate to Recipient Configuration > Mailbox Double click the User and go to Activate tab Mail Flow Settings and open the Properties of the Message Size Restrictions settings:
These are the default settings
You can also configure these settings using the EMS
Set-Mailbox UserID –MaxSendSize 2GB –MaxReceiveSize 2GB
