We were getting the following error after a migration to Exchange 2010 from 2003 which indicated that Exchange was still looking for the old server.
Event: Microsoft Exchange cannot find a route to the source transport server or home MTA server
The problem is during the migration the old server didn’t get pulled from Active Directory correctly so there were still settings that caused Exchange to believe that there was another MTA available… Continue reading

 5.7.1 Client does not have permissions to send as this sender

This is what your Microsoft Exchange 2007 and or 2010 server may report when you try to send email through the Exchange server when permissions have been fouled up. The First this to check on is the “Manage Send As Permissions” under the user mailbox properties in the Exchange Management Console. Access the Exchange management console and select the user… Continue reading

 

Generally this condition occurs if anyone of the following conditions is true:

1. The fully qualified domain name (FQDN) that is specified in the Warning event has been defined on a Receive connector .

2. Send connector on a Microsoft Exchange Server 2007 transport server, and no certificate is installed on the same computer that contains the… Continue reading

Increasing MS Exchange 2010 message size limits

On July 13, 2011, in How-to, by Cubert aka (Cube Dweller)

There’s a few places you must go to change this and that is in global settings under Organization Configurations as well as the HUB Transport connectors under Server Configuration.

To modify the global settings go to the following menu areas inside you Exchange Management Console. 
Organization Configuration->Hub Transport->Global Settings tab->Properties of Transport Settings
 

Here you can adjust your… Continue reading

Cleaning Up the Exchange 2003 Server’s SMTP Queues after NDR attacks

On May 7, 2010, in How-to, by Cubert aka (Cube Dweller)

Warning: This process will delete all email that is due to go to external recipients. Internal messages are not affected, neither are new inbound messages from the Internet unless they are from the spammer continuing to try and abuse your server.

Capturing the Messages Into a Single Queue

This process requires an SMTP connector for all addresses. If you don’t already have one (with a * on the Continue reading

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