HostMonster Web Hosting Help

Email Attachments - Blocked File Extensions

Here is a list of file extensions which are not allowed to be sent to any email address on the server. If someone attempts to send an email to a HostMonster account with an attachment that has one of these extensions, the email will be returned to the sender and they will be notified that the attachment cannot be sent.

The reason behind this is because files with these extensions can be used to run a program that will install viruses or seriously damage your computer. Spammers and hackers often send emails with these attachments trying to get users to open the attachment. Once it is opened, the computer is infected.

File extensions:

bat
chm
cmd
com
cpl
crt
exe
hlp
hta
inf
ins
isp
jse?
lnk
mdb
ms[cipt]
pcd
pif
reg
scr
sct
shs
vb[se]
ws[fhc])

Knowledgebase Article

222,429 views

bookmark

Share or save this via:

tags: attachment block blocked email malware trojan virus

Recommended Help Content

Email Attachment Size Limit

Can I send an email with large files/attachments?

Knowledgebase Article

399,179 views

tags: email limits

Email not sending from Client or Webmail

Trying to send out emails from multiple email accounts fail from both webmail and third party email clients. Possible Reasons: The maximum emails per hour has been exceeded. This can be caused by forw

Knowledgebase Article

591,543 views

tags: email exceeded mailbox outlook quota receive receiving send sender unable

Google Flagged My Site as Malware

How to remove the "This site may harm your computer" warning in Google search results.

Knowledgebase Article

366,655 views

tags: block blocking google malware

Related Help Content

Antivirus on Dedicated or VPS servers

If you suspect malicious content, hacks or a virus on your VPS/Dedicated account here are some tools located in your WHM that you can use.

Knowledgebase Article

194,903 views

tags: clamav dedi dedicated malware virus vps

Create Custom MIME Types

This article will explain how to create MIME types.

Knowledgebase Article

155,183 views

tags: create custom extensions files mime types

Cron Jobs with PHP and other File Types

This article will explain how to run php and other file types using Cron jobs.

Knowledgebase Article

525,262 views

tags: cron file jobs php

Local MySQL Connection Blocked To Server

I get the following database connection error: Warning: mysql_connect() [function.mysql-connect]: Host 'host#.HostMonster.com' is blocked because of many connection errors; unblock with 'mysqlad

Knowledgebase Article

266,870 views

tags: blocked connection host localhost mysql

RoundCube

. Click the RoundCube logo. This takes you to the main interface screen for RoundCube where your Inbox will be displayed. On the left are your email folders, by default, RoundCube will always show you

Getting Started Article

360,413 views

tags: email message reply roundcube send

Email Troubleshooting

Can't receive emails? Here are a few things to try.

Knowledgebase Article

198,184 views

tags: email troubleshooting

If Your Local IP is Blacklisted

This article outlines what to do if you find your local IP address has been blacklisted.

Knowledgebase Article

192,205 views

tags: access addresses anti blacklist blacklisted blocked denied ip local malware

How To Change SMTP Port From 25 To 26 - Email Troubleshooting

How can I change the outgoing SMTP port from 25 to 26?

Knowledgebase Article

598,816 views

tags: email outgoing port send sending smtp