This site utilizes JavaScript to function correctly. Looks like it's disabled on your browser. Please enable it for your best experience.

For instructions on enabling JavaScript, click here

Skip to main content
Search

Just Host 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 Just Host 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 222,360 views bookmark
share
Share or save this via:
tags: attachment block blocked email malware trojan virus


Was this resource helpful?
Helpful Unhelpful


Did this resolve your issue?
Solved Unsolved


Please add any other comments or suggestions about this content:





Recommended Help Content

Email Attachment Size Limit
Can I send an email with large files/attachments?
Knowledgebase Article 399,101 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 591,446 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 366,592 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 194,841 views tags: clamav dedi dedicated malware virus vps

Create Custom MIME Types
This article will explain how to create MIME types.
Knowledgebase Article 155,111 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 525,179 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#.Justhost.com' is blocked because of many connection errors; unblock with 'mysqlad
Knowledgebase Article 266,823 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 360,319 views tags: email message reply roundcube send

Email Troubleshooting
Can't receive emails? Here are a few things to try.
Knowledgebase Article 198,106 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 192,101 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 598,703 views tags: email outgoing port send sending smtp

*Promotional pricing is for the first term only and regular rates apply upon renewal. 30-Day Money-Back Guarantee does not extend to domain names.

** Google ad credits are only available to customers in the United States, Canada, and the United Kingdom at this time.

¹ VAT (Value Added Tax) is not included in our advertised price and will be charged separately and itemized on invoices and billing information. Standard VAT rates based on EU Member State regulations may apply. Learn more.