Peter Van Eeckhoutte's Blog

Posts Tagged ‘attachments’

It may sound a bit extraordinary, but I needed to have the ability to change attachment filenames while they were being processed by the transport service on Exchange. I can’t really tell you why I needed this functionality, but I guess there could be many reasons to do so. (e.g. zip files should be renamed to .zip.renamed  so they need to be saved to disk first, renamed and then opened, and so on).  Anyways, I could not find a way to do this with the Exchange built-in features, so I had to write my own custom transport agent to do this.

The agent is written in C#, uses .Net Framework 3.5, uses the native MS Exchange API’s and works fine with Exchange 2007 (I’ve only tested SP1) and 2010 (beta 1). The dll has been compiled for x64 (64bit) systems only.
Putting …

1. Manage Attachment behaviour 1.1. Outlook 2007 Although you probably have deployed an antivirus solution in your messaging infrastructure, by default, Outlook blocks access to certain attachments, even if they have been scanned or not. After all, Outlook doesn’t really know if an attachment has been scanned and is safe for you to open. The list of attachments that are being blocked out of the box can be found at http://office.microsoft.com/en-us/outlook/HP030850041033.aspx There may be valid reasons why certain attachments should not be blocked, so if you want to allow attachment extensions from the list of Level1 attachments (see URL above), this is how you should do it : Close Outlook …