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Blocking Attachment from Webmail or Email Client.
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Blocking Attachment from Webmail or Email Client. - 4.Feb.2007 2:38:45 PM
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ashraf
Posts: 2
Joined: 1.Feb.2007
Status: offline
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I have installed ISA server 2006 Enterprise eddition on a windows 2003 server. I want to block all email attachments sent from any webmail sites either free email provider or paid. Like - Yahoo, Rediff, Hotmail etc. Email attachments should not go to any internet email through outlook also. But at the same time I want to allow some Project Manager to send attachments but not from any webmail but from outlook only.
I am also using one intarnal exchange server server for internal office communication on local intranet only. It is not published on internet. I want using local account people can interchange email with attachment. i want to block attachment sending on internet.
Please reply ASAP
Best Regards
Ashraf
Email - mustafar@halosys.com
Contact - + 91 999 916 9294
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RE: Blocking Attachment from Webmail or Email Client. - 4.Feb.2007 7:23:14 PM
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ashraf
Posts: 2
Joined: 1.Feb.2007
Status: offline
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Hi Tarek,
I have done all the steps as given on link. And tried after applying changes. When I send mail from my yahoo and gmail account with attachment it safely received my anothe email account.
Please advise what should I do?
I really want to stop sending attachment from any computers from my network behind ISA. I am using ISA server 2006.
Best Regards
Ashraf
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RE: Blocking Attachment from Webmail or Email Client. - 5.Feb.2007 1:15:12 AM
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elmajdal
Posts: 5028
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline
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quote:
I have done all the steps as given on link. And tried after applying changes. When I send mail from my yahoo and gmail account with attachment it safely received my anothe email account.
i link i refered it to you above will stop attaching to your mail when u are composing .
It will not stop recieveing attached messages.
By the way, u have an exchange server , so why u dont get GFI Mail Security !! check it here : http://www.gfi.com/mailsecurity/msecfeatures.htm
_____________________________
Tarek Majdalani
MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8
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RE: Blocking Attachment from Webmail or Email Client. - 22.Jul.2007 4:58:52 AM
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justmee
Posts: 503
Joined: 14.May2007
Status: offline
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Hi,
if you want to block users to download the attachments from their mail use this signature:
Search in: Response Headers
Http Header: Content-Disposition
Signature: attachment
I've tested this with gmail yahoo, hotmail.
Tarek's link will stop adding/uploading attachments.
Regards!
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RE: Blocking Attachment from Webmail or Email Client. - 22.Jul.2007 9:04:32 AM
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ferrix
Posts: 358
Joined: 16.Mar.2005
Status: offline
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None of this will work over https by the way, for that you'd need an ISA filter add-on.
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RE: Blocking Attachment from Webmail or Email Client. - 23.Jul.2007 2:52:42 AM
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justmee
Posts: 503
Joined: 14.May2007
Status: offline
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Hi Greg,
Yes that's true, but we don't use ssl after login with Yahoo or Hotmail(at least according to my knowledge).
I saw that gmail can use it if we go by https://....
Regards!
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