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How Can I send executable files by email

hadden
Grafter
Posts: 486
Thanks: 2
Registered: ‎27-07-2007

How Can I send executable files by email

This was going to be a rant, but I've restrained myself...
To try and send legitimate executable files by email, I have gradually had to implement more sophisticated workarounds, to avoid being blocked, including the following:
[list type=decimal]
  • Rename the file to a non executable extension

  • Put the file in a zip

  • Put the file in a zip and encrypt the zip

  • Encrypt the file in a zip with the highest possible level of encryption

  • Rename the zip file to have an extension other than "zip"

  • Rename the file to a non executable extension, place it in a zip, encrypt the zip and then rename the zip file to have a non "zip" extension.


  • However, even these measures are sometimes now not enough.
    If anyone has any other simple practical workarounds that you have found to work, could you please let me know?
    I have also tried the following

    • Upload to web or ftp server, but many recipients are also not allowed to download.
    • Encrypted email, but less than a handful of my recipients are setup for this.


    43 REPLIES
    Plusnet Alumni (retired) orbrey
    Plusnet Alumni (retired)
    Posts: 10,540
    Registered: ‎18-07-2007

    Re: How Can I send executable files by email

    Try winrar as opposed to winzip - rar files tend to get through in my experience. Alternatively you could add to a zip, then add the zip to another zip along with a small text file or something - that might work though winrar will probably be easier.
    hadden
    Grafter
    Posts: 486
    Thanks: 2
    Registered: ‎27-07-2007

    Re: How Can I send executable files by email

    Thanks.
    Yes, rar files have more success, but the lack of WinRAR on recipient PCs is a bit of extra hassle for them (some more than others).
    I stopped short of trying the zip inside a zip method for a client this morning, as I was beginning to wonder if any attachments were allowed and, as you say, there should be something easier. I may have given up too quick, so I should be prepared to try it, just in case.
    [I also still feel that I've got an unsatisfied rant inside me about this Sad ]
    Community Veteran
    Posts: 18,026
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    Registered: ‎06-11-2007

    Re: How Can I send executable files by email

    I`m no expert (as many may know) but I had an idea that may broaden the discussion....
    Could you set up a website, with password access, to page two, then upload the file(s) to page 2.
    Send an email to the client, with the password, (or if regular user just an advice) that the file(s) are available for download?
    Or maybe not.....
    James
    Grafter
    Posts: 21,036
    Registered: ‎04-04-2007

    Re: How Can I send executable files by email

    Nice idea Shutter, but it may be a similar problem to using FTP.
    Community Veteran
    Posts: 18,026
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    Registered: ‎06-11-2007

    Re: How Can I send executable files by email

    so how do the likes of Ccleaner/adware/Irfanview/spybot/AVG/and many others do it?
    Plusnet Alumni (retired) orbrey
    Plusnet Alumni (retired)
    Posts: 10,540
    Registered: ‎18-07-2007

    Re: How Can I send executable files by email

    It's not hosting the files that's the problem (though I'm making an assumption here) - I'm guessing the OP is emailing these files to people in offices or schools or otherwise behind a restrictive firewall which blocks their access to http or ftp downloads.
    hadden
    Grafter
    Posts: 486
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    Registered: ‎27-07-2007

    Re: How Can I send executable files by email

    I am able to upload files for clients to download but, as you say, some are blocked from downloading, so that workaround isn't always available.
    Community Veteran
    Posts: 4,729
    Registered: ‎04-04-2007

    Re: How Can I send executable files by email

    A trick that I have used to get exe files through, is to “uu” encode them. This converts any file into a 7bit ASCII text file, which will look like this;
    (OK example is a unix file)
     begin 644 somefile.tar.Z
    M'YV0=LZ4D>,B#)DW;,K,&5/&#9T8+6#<< $CAHL8,F#@T"'CAHX8,UX &$F
    …..
    D%ED5FJ*+L-'FF3=A([60C037E3K0C<MS>Z[/_;E -^@*W44*

    end

    This fools most systems, as the file is just plain text.
    WinZip and most archive managers will handle “uu” files.
    Chilly
    hadden
    Grafter
    Posts: 486
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    Registered: ‎27-07-2007

    Re: How Can I send executable files by email

    uuencoding...
    Jings, that takes me back  Smiley
    I can just about remember using .uue files for newsgroups and an old email client.
    However, you've stimulated me to rethink through the various alternative encoding/compression techniques. However, I am still hoping for another general solution, that doesn't rely on the recipient requiring to use a non built-in software capability.
    VileReynard
    All Star
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    Registered: ‎01-09-2007

    Re: How Can I send executable files by email

    Is there an equivalent to linux wget command for your clients?
    I assume the clients aren't prevented from web access?

    hadden
    Grafter
    Posts: 486
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    Registered: ‎27-07-2007

    Re: How Can I send executable files by email

    As I understand it, wget uses http or ftp protocols to download, so that it equivalent to the recipients using a web browser to download the files.
    Community Veteran
    Posts: 1,236
    Registered: ‎02-08-2007

    Re: How Can I send executable files by email

    Quote from: JohnJ
    • Upload to web or ftp server, but many recipients are also not allowed to download.

    Why not?
    I know Vista is ridiculious with things like this but surely you can still download any file you want?!
    I regurarly use this method. I would have a folder of digital photos of several hundred meg from which I would create a self-extracting winzip file from (.exe) and then upload to one of my servers for friends and family. Not encountered any problems yet.
    hadden
    Grafter
    Posts: 486
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    Registered: ‎27-07-2007

    Re: How Can I send executable files by email

    Quote from: Sean
    Why not?

    The downloading restriction is not a technical issue, it's an IT administrative policy, in some places.
    The policy is applied when a corporate IT support doesn't trust the users and are worried that a user might download something that breaks their PC.
    Community Veteran
    Posts: 1,236
    Registered: ‎02-08-2007

    Re: How Can I send executable files by email

    Ok, I understand now. I just asumed that it was home users.