Messaging Gateway

Hi,

I have Exchange Server 2010 and Symantec Messaging Gateway that is running in house, but the email size limitation somehow differs and caused some confusion.

So in this case:

Exchange Server 2010 values:

[PS] C:\>Get-TransportConfig | fl *Max*
MaxDumpsterSizePerDatabase      : 50 MB (52,428,800 bytes)
MaxDumpsterTime                 : 7.00:00:00
MaxReceiveSize                  : 50 MB (52,428,800 bytes)
MaxRecipientEnvelopeLimit       : 5000
MaxSendSize                     : 50 MB (52,428,800 bytes)
ExternalDsnMaxMessageAttachSize : 25 MB (26,214,400 bytes)
InternalDsnMaxMessageAttachSize : 25 MB (26,214,400 bytes)

[PS] C:\>Get-ReceiveConnector | fl *MaxMessageSize*
MaxMessageSize : 100 MB (104,857,600 bytes)
MaxMessageSize : 100 MB (104,857,600 bytes)

[PS] C:\>Get-SendConnector | fl *MaxMessageSize*
MaxMessageSize : 100 MB (104,857,600 bytes)

Symantec mail Gateway (Brightmail appliance) values: 

"Inbound SMTP Configuration Maximum message size in bytes": 20971520 bytes
"Outbound SMTP Configuration Maximum message size in bytes": 20971520 bytes

Which values should I standardize and make it the same ?

Does it requires any outage or reset of the server ?

Since the Messaging Gateway is not as granular as the Exchange connector, you should adjust the Messaging Gateway to accept the largest size that you have set up on the Exchange size in regards to receiving size and sending size.

ok, so once changed, is there any outage required ?

No, the settings files will be changed and the MTA will reinitialize with the new settings.

ok, is there any impact if I set it to the largest one like 100MB ?

That should be fine.