The University of Otago currently blocks certain files attached to email messages based on the filename. This is in order to help manage the distribution of malware in certain types of files. A full list of blocked extensions is below.
Any files that are considered inappropriate are replaced in the email message with a standard notice that informs the recipient that the attachment has been replaced. The sender of the email is not notified.
The original file is placed in the PureMessage quarantine. Each day recipients are sent a digest listing of any messages that have been quarantined so they may be released if appropriate.
Alternatively, the End User Web Interface for PureMessage can be used to release the full email.
| .ade | Microsoft Access Project extension |
| .adp | Microsoft Access Project |
| .app | generated application |
| .asp | Active server pages |
| .bas | basic program |
| .bat | batch |
| .cab | cabinet file |
| .chm | compiled HTML help |
| .cla | clarion db app |
| .class | Java bytecode |
| .cmd | command |
| .com | command executable |
| .cpl | control panel applet |
| .crt | security certificate |
| .dll | dynamic link library |
| .docm | Microsoft Word Open XML macro-enabled document |
| .drv | device driver file |
| outlook express mail message | |
| .eml | Outlook Express Mail Message |
| .exe | executable program |
| .hlp | help file |
| .hta | HTML application |
| .inf | setup file |
| .ini | initialisation file |
| .ins | installation script |
| .isp | Internet communications settings |
| .js | JScript |
| .jse | JScript encoded |
| .lnk | shortcut |
| .mdb | Microsoft Access application |
| .mde | Microsoft Access database |
| .msc | Microsoft common console document |
| .msi | install control program |
| .msp | windows installer patch |
| .mst | windows installer transform |
| .ocx | ole control extension |
| .pcd | photo CD |
| .pif | windows program information file |
| .rar | WinRAR RAR compressed archive |
| .reg | registry |
| .scr | screensaver |
| .sct | windows script component |
| .shb | document shortcut file |
| .shs | shell scrap object |
| .sys | system (device driver) file |
| .url | Internet location |
| .vb | VBScript |
| .vbe | VBScript encoded file |
| .vbs | visual basic |
| .vxd | virtual device driver |
| .wsc | windows script component |
| .wsf | windows script file |
| .wsh | windows script host settings |
| .zip | file archive |