re-creating the default receive connectors on exchange 2013 I recently ran into a server that no longer wanted to route mail and responded with PRX4 and PRX5 temporary server errors after a failed upgrade with the latest CU. These errors are attributed to dns problems, however in this case DNS was fine. Even after restoring […]
Month: January 2020
Exchange 2010: Setup SMTP
Expand the organization configuration Expand hub transport Choose the tab Send Connectors Create a new send connector, with the intended use: Internet Add as address space: * Finalize the wizard SMTP mail on the server, take the following steps: Expand Server Configuration Select Hub Transport Bring up the propterties of the default receive connector Add […]
Exchange 2010: Old fashioned POP without TLS/SSL
If you still need to support old fashioned POP connections over port 110, you need to make the following configuration steps: Expand Server configuration Select Client Access Bring up the properties page for the POP3 connector Switch to the Authentication tabs Enable planin text logon Enable the POP3 service in the services panel, and set […]
Exchange 2010: Limit store memory usage
MS Exchanges store process by default uses all memory on the server and releases memory when other process require it. There is much discussion floating around about the good and the bad of this. Very generaly speaking it is a good thing if you have dedicated exchange servers, but it can be a very bad […]
Exchange 2010: Add a new domain name
Expand the organization configuration Expand the HUB Transport role Configure the tab “Accepted domains”
Correctly configuring NDR and DNSBL on Exchange 2003
By default, your Exchange 2003 server will happily accept all mail, only to find during processing that it can not deliver certain mails. It will ony then generate a message back to the sender that the mail cannot be delivered. While this is fine for legit senders, it becomes problematic with spam. Spam generaly has […]
Command line mailbox import and export with exchange
The more recent MS Exchange versions support importing an dexporting of mailboxes directly to and from PST files on your server. This method uses the same technology stack Outlook uses, which means at the time of writing a mailbox size limit of 20GB. If you have more data in a single mailbox you will need […]
Blocking the Outlook app for android and IOS
The newly released Outlook app for IOS and Android has some pretty different behavior from the usual stock email clients, and incorporates some pretty serious security and privacy risks. There is a comprehensive writeup here that i heartily recommend for anyone interested in the inner workings. The short summary is: Your data will be copyed […]
Sorting an ArrayList with Objects
Sorting an ArrayList based on an integer field Sorting an ArrayList based on a double field Sorting an ArrayList based on String field
Prevent double clicking on a button
Processing postbacks can be a lengthy experience at times, if you need to do a lot of processing, or a confronted with a slow server. Users may be tempted to either click again, or just simply think they need to double click your button. This tiny piece of javascript can be added to a page […]