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#1 2020-02-03 18:53:30

dbvolvox
Member
Registered: 2015-09-29
Posts: 59

Metadata Scrubber for Thunderbird Attachments

I have started looking at this since gmail recently rejected my emails, they had an editable document as an attachment, on security risk grounds. The .pdf version was fine as the metadata load is low.

I can view and remove document metadata with mat2 in a terminal but wondered if anyone has anything that works with email attachments on the fly?

Thanks, David

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#2 2020-02-04 01:14:32

johnraff
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From: Nagoya, Japan
Registered: 2015-09-09
Posts: 6,383
Website

Re: Metadata Scrubber for Thunderbird Attachments

I don't know, but does packing the document inside a .tar.gz or .zip file help at all?


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#3 2020-02-04 08:21:45

dbvolvox
Member
Registered: 2015-09-29
Posts: 59

Re: Metadata Scrubber for Thunderbird Attachments

johnraff wrote:

I don't know, but does packing the document inside a .tar.gz or .zip file help at all?

This from the Gmail advice..

To protect you against potential viruses and harmful software, Gmail doesn't allow you to attach certain types of files, including:

    Certain types of files, including their compressed form (like .gz or .bz2 files) or when found within archives (like .zip or .tgz files)

and

Types you can't include as attachments

To protect your account, Gmail doesn't allow you to attach certain types of files. Gmail often updates the types of files not allowed to keep up with harmful software that is constantly changing. Some examples include:

.ade, .adp, .apk, .appx, .appxbundle, .bat, .cab, .chm, .cmd, .com, .cpl, .dll, .dmg, .exe, .hta, .ins, .isp, .iso, .jar, .js, .jse, .lib, .lnk, .mde, .msc, .msi, .msix, .msixbundle, .msp, .mst, .nsh, .pif, .ps1, .scr, .sct, .shb, .sys, .vb, .vbe, .vbs, .vxd, .wsc, .wsf, .wsh

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#4 2020-02-04 15:28:32

damo
....moderator....
Registered: 2015-08-20
Posts: 5,633

Re: Metadata Scrubber for Thunderbird Attachments

^ A workaround could be to upload your "problem" file to eg Dropbox or G Drive, and put the d/l link in your email.


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#5 2020-02-04 17:15:33

brontosaurusrex
Middle Office
Registered: 2015-09-29
Posts: 1,992
Website

Re: Metadata Scrubber for Thunderbird Attachments

Old trick was to rename .zip to .pip (or similar).

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#6 2020-02-06 08:56:29

dbvolvox
Member
Registered: 2015-09-29
Posts: 59

Re: Metadata Scrubber for Thunderbird Attachments

Apparently it is common practice for legal offices to scrub all attachments leaving their offices.
When posting documents on their websites are forum members removing metadata?

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#7 2020-02-06 09:05:40

damo
....moderator....
Registered: 2015-08-20
Posts: 5,633

Re: Metadata Scrubber for Thunderbird Attachments

^ I do that with uploaded images.


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#8 2020-02-06 12:47:49

clusterF
Member
Registered: 2019-05-07
Posts: 520

Re: Metadata Scrubber for Thunderbird Attachments

dbvolvox wrote:

I have started looking at this since gmail recently rejected my emails, they had an editable document as an attachment, on security risk grounds. The .pdf version was fine as the metadata load is low.

I can view and remove document metadata with mat2 in a terminal but wondered if anyone has anything that works with email attachments on the fly?

Thanks, David

What was the format of the editable document?

Last edited by clusterF (2020-02-06 12:57:41)


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#9 2020-02-06 15:46:34

dbvolvox
Member
Registered: 2015-09-29
Posts: 59

Re: Metadata Scrubber for Thunderbird Attachments

clusterF wrote:
dbvolvox wrote:

I have started looking at this since gmail recently rejected my emails, they had an editable document as an attachment, on security risk grounds. The .pdf version was fine as the metadata load is low.

I can view and remove document metadata with mat2 in a terminal but wondered if anyone has anything that works with email attachments on the fly?

Thanks, David

What was the format of the editable document?

It was a Word .doc created in LibreOffice

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#10 2020-02-07 02:36:22

DeepDayze
Member
From: In Linux Land
Registered: 2017-05-28
Posts: 792

Re: Metadata Scrubber for Thunderbird Attachments

Another way is encrypting the attachment by placing the document inside a password protected zip file. 7-Zip makes password protected archives easily.

You can then send the recipient the password in  a separate email.

I do this if I need to send scripts attached to an email.

Last edited by DeepDayze (2020-02-07 02:37:55)


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