[Yandex Cloud documentation](../../index.md) > [Yandex Cloud Postbox](../index.md) > [Concepts](index.md) > Limitations on email attachments

# Limitations on email attachments

In Yandex Cloud Postbox, certain limitations apply to email attachments. Below is the list of file extensions you cannot send in emails.

## A

* .ade
* .adp
* .app
* .asp

## B

* .bas
* .bat

## C

* .cer
* .chm
* .cmd
* .com
* .cpl
* .crt
* .csh

## D

* .der

## E

* .exe

## F

* .fxp

## G

* .gadget

## H

* .hlp
* .hta

## I

* .inf
* .ins
* .isp
* .its

## J

* .js
* .jse

## K

* .ksh

## L

* .lib
* .lnk

## M

* .mad
* .maf
* .mag
* .mam
* .maq
* .mar
* .mas
* .mat
* .mau
* .mav
* .maw
* .mda
* .mdb
* .mde
* .mdt
* .mdw
* .mdz
* .msc
* .msh
* .msh1
* .msh2
* .mshxml
* .msh1xml
* .msh2xml
* .msi
* .msp
* .mst

## O

* .ops

## P

* .pcd
* .pif
* .plg
* .prf
* .prg
* .ps1
* .ps1xml 
* .ps2
* .ps2xml
* .psc1
* .psc2

## R

* .reg

## S

* .scf
* .scr
* .sct
* .shb
* .shs
* .sys 

## T

* .tmp

## U

* .url

## V

* .vb
* .vbe
* .vbs
* .vps
* .vsmacros
* .vss
* .vst
* .vsw
* .vxd

## W

* .ws
* .wsc
* .wsf
* .wsh

## X

* .xnk