Handling email attachments

For security reasons some file formats can't be sent as attachments in email.

Approved file formats in attachments

The file formats listed below are approved if you send them in an archive file (.zip or .rar-files for example).

Here is an example of different types of archive files: .zip, .tar, .tgz, .taz, .z, .gz, .rar

File formats that are whitelisted (approved):

*.M .*CPP *.JAVA *.patch *.JS *.MAT *.CXX *.H *.BS *.PRO *.txt *.c *.html *.m *.cpp *.java *.js *.mat *.cxx *.h *.bs *.pro

Non-approved file formats in attachments

You may not send or recieve the following file formats:

.ade, .adp, .bat, .chm, .cmd, .com, .cpl, .docm, .exe, .hta, .ins, .isp, .jar, .jse, .lib, .lnk, .mde, .msc, .msp, .mst, .pif, .scr, .sct, .shb, .sys, .vb, .vbe, .vbs, .vxd, .wsc, .wsf, .wsh

Emails that contain any file format listed above will automatically be returned to the sender. For security reasons it is not possible to send an email with these file formats at KTH even if they are in an archive file.

Excelfile containing macros might get caught depending on how the macro is interpreted in the automatic examination. This applies to filetypes .xls, .xlsx, .xlsm

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Last changed: Apr 13, 2018