Software :: Blocking All Incoming Email Attachments
Oct 30, 2010
I have an interesting job at hand. A client has asked me to generate an email account for him that will block ALL file attachments unless specific email addresses are added to a white list. Cpanel doesn't seem to allow this because of Exim (from what the server techs tell me).So here I am, asking the wise. Please let me know what options there are. I don't mind installing a 3rd party email system on the server just for this client if it's possible and won't interfere with WHM/Cpanel.
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Feb 5, 2010
I'm running SuSE 11 with sendmail and dovecot.I'm sending and receiving mail. But as soon as someone sends me a mail with an attachment over 1mg it seems to fail. I have no problem sending big attachments.
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Sep 21, 2010
I'm at a complete loss on this one.MY version of Firefox 3.6.10 (Ubuntu 10.04 LTS) opens all email attachments with no problem. However, my sister's machine--same 3.6.10 and 10.04 LTS--does not. Instead, she gets the following message: "(PDF or JPEG) could not be opened because the associated helper application does not exist. Change the association in your preferences."I've checked all her preference settings against mine, and they match...but mine works and hers does not. (Also verified that "Document Viewer" and "Image Viewer" are installed properly...)
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Jan 6, 2011
I'm about to start trying to write a script to backup / with just something like tar, or dd, split into 24mb files and email to myself.What could possibly go wrong? I'm amazed I couldn't find anything in my searches on this specifically.What I want is to go from a Gentoo rescue CD to a restored system as easily as possible.I tried rsync over gmailfs but that just froze. I can't really see that working too well anyway.
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Dec 10, 2008
I admit to being a starter having recently switched from XP. How do I deliver emails to the remaining XP users that that have attachments thay can read if they are using microsoft packages of various ages especially when they have less computer skills than even me. Should I load word through WINE and send an Word emulating document?
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Dec 9, 2010
I manage a linux-based network, where some projects are currently under development. Our IT policy states that any email attachment shall be encrypted using GPG. Can I block other attachments using a firewall?
Note: Currently our mail server is not in campus. So I can only use a firewall for this security issue.
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Jun 9, 2010
How could we bcc all outgoing / incoming email through my Sendmail (8.14) Server?
I tried this /etc/procmailrc
:0c
! backupmail@domain.com
But this get looped and backupmail received multiple emails of each for domain.com while sending locally from one user to another user.
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Aug 25, 2010
I am planning an issue tracking system that I will build in Django and Python and host on a Debian server. Being an issue tracking system it will have to send and receive emails. I can easily configure the send mail functionality using python inbuilt functions. But is there a way to create new content from an incoming email?
e.g. scenario > User sends email to support@university.edu and the issue management system picks up that email (somehow) and creates a new issue based on contents of the email (preferably in real time but some delay is acceptable).
I have looked at postfix and sendmail but neither allows you create new content (issue) from an incoming email. Any thoughts?
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Sep 1, 2011
I have been trying to solve this problem for two days now looking at various forums and websites but can't really figure out what's going on here.I have setup postfix on my ubuntu and I can send emails using "telnet localhost 25" and the ehlo thingy. Apache can also send emails. My problem is with incoming emails. When I try to send an email (through Gmail) I get the following error message:
Code:
Delivery to the following recipient has been delayed:
root@example.com
[code]...
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Mar 23, 2010
For system calls, is blocking or non-blocking default in C? Simple question, just am not seeing the answer super quickly.
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Dec 25, 2010
I have a device that is working on modbus protocol andI have written a small program(with block TCP read method ) to read its registers via modbus protocol.my program is working very well but except those times that I unplug the Ethernet cable or turning off the modbus gateway during programs work.at this time my program stops on recv system call (if it reach this system call exacly when I unplug Ethernet cable or turning off the modbus gateway during programs work).I changed my source to work in nonblock TCP method, at this time with the same situation my program does not stop/block on recv system call but after pluging back the Ethernet cable or resuming the connectivity situation back it reads data incorrectly .this is my code:Quote:
#define DEBUG
#include <fcntl.h>
#include <string.h>
[code]...
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Feb 22, 2010
at my work we have upgraded suse to 11.2, thus we also got an upgrade of thunderbird 2 to 3.
When I now save attachments to our network disks it writes them as user=rw (600), and no longer as 644. I do not want to do chmod for every attachment.When creating a file by csh or bash terminal or downloading a file by firefox it does write the file as 644, which is good.
Can someone please give me a suggestion of how I can solve this problem? Is there something I have to change in the prefs.js file?
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Jul 3, 2010
Is there a setting to make the default in Kmail to save the attachments (or when dragging them into a folder) so they are NOT set to read-only?
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Nov 29, 2010
how to send attachments in G2Ipmsg.
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Aug 5, 2010
I have set up a Sympa list serv server and everything is working fine for the most part. One issue that I am running into is sending files over ~580 KB in size (just a normal .txt file) are not going through. I am getting the following error. Impossible to distribute your message for list 'list-name' because of an internal server error.I have verified that my "Maximum message size (max_size)" setting in Sympa is get to 5 MB so that shouldn't be the problem. If I try sending the same .txt file after taking out a few lines, and the file size is ~530 KB, then it works just fine. Nothing is really jumping out at me in the logs either.
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Jul 7, 2011
I have centos 5.3 installed with squid server. I want to block attachment in yahoo, google, etc.
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May 7, 2010
I was wondering how to block attachments to gmail. I am running squid 2.7 stab9 with dansguardian 2.10, users authenticated from LDAP. I have configured the POST restrictions in Dansguardian which does block all attachments to hotmail/yahoo etc etc but attachments to gmail continue to upload.
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Apr 13, 2011
I have Internet access with Verizon Wireless and have a limit of 5 gigs per month but Mozilla Thunderbird 3.1.8 is wasting my data whenever I send large attachments. For example, when I send an attachment to somebody, Thunderbird will upload it okay but when it is finished uploading it, the message in the window then says "copying to the Sent folder" but it does not simply "copy" it, instead, it uploads the attachment all over again to the Sent folder. So the attachment was uploaded twice, once to the recipient and once to my sent folder.I am running Linux Mint 9 Isadora.Is there a way to stop this behavior?
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Jul 20, 2010
when I first started with tbird version 3.0.5, under that version everything worked fine and attachments etc. downloaded, but tbird was automatically upgraded to 3.1 since then attachments don't download and pictures don't appear in emails.What do I need to do to correct this?
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Mar 29, 2011
Running Postfix 2.6.1 on Slackware 13.0.I noticed that if I send an email with a large attachment(namely more than 500 KB) from another computer using this postfix server as an smtp server, it takes up to an hour to send it.It's almost like postfix is configured to send large emails later with a lower priority.The client computer and postfix server are within a GIGABIT LAN so upload 500 KB isn't an issue.
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May 10, 2010
Recently installed debian lenny.Running very well.WM: ratpoison.Suddenly, today, the internet runs much slower.ONLY ON THIS MACHINE - the parallel windows machine, off of which I was successfully weaning myself, is not having this problem, so it's neither the router nor the actual internet connection.Specifically: I can't attach a document in yahoo mail.I tried it in iceweasel, same problem, so it's not the browser.I piped the output of "top" for a minute or so to a text file, which I'm attaching.
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Apr 11, 2011
I am trying to filter out attachment emails using procmail. I have tried this:
Code:
#Config:
SHELL=/bin/sh
PATH=/bin:/usr/bin:/usr/bin
MAILDIR="/var/mail/root"
LOGFILE=/var/log/procmail.log
LOGABSTRACT=ALL
VERBOSE=ON
:0
*^Content-Transfer-Encoding: base64$ {
| echo $LASTFOLDER }
[/code]
As you can probably guess, this line "Content-Transfer-Encoding: base64" appears when emails come with attachments, but the result of this filter is:
Code:
procmail: No match on "^Content-Transfer-Encoding: base64"
procmail: Skipped "| echo $LASTFOLDER"
procmail: Assigning "echo"
procmail: Skipped "| $LASTFOLDER"
procmail: Assigning "LASTFOLDER=/var/mail/root/msg.OFT"
procmail: Opening "/var/mail/root/msg.OFT"
procmail: Acquiring kernel-lock
procmail: Notified comsat: "root@0:/var/mail/root/msg.OFT"
From root Mon Apr 11 01:23:37 2011
Subject:
Folder: /var/mail/root/msg.OFT 26051
The result showed as if there was no match, futhermore, the bash code that I am trying to run:
echo "$LASTFOLDER" seemed not to be ran as bash? And does anyone know how I can test my procmail filter on some testing platform sandbox so I don't have to send a bunch of emails everytime I change the file and waste time and disk space testing new filters?
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Nov 17, 2010
How would one go about reading a mailbox, and detaching the attachment (a csv file) in all unread mails for processing?
I plan to do this in bash or perl. I am looking for ideas or sample code.
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Mar 11, 2015
Is there anyway to get evolution to not automatically print email attachments?
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Jan 12, 2011
Not long ago I installed the Linux version of the Real Player (bad, bad me,I know) on my Debian Lenny system. Now Kmail will only open mp3 files attached to incoming mail with the Real Player.Outside of Kmail I have VLC set as my default player for mp3 files and that works fine but Kmail isn't respecting my system choices and I can't find any means, or reference to, changing the default media player in Kmail.This is so incredibly frustrating that it's almost like being stuck with a Windows system again.As a full-time Linux user I've lost my sense of martyred patience.
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Nov 9, 2010
Chrome crashes when I try to send attachments using Gmail, instead firefox works fine. Several users have the same problem, but I could't find a solution.I use openSuse 11.3, Chrome 7.0.517.44 and the lastest flash version.
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Mar 22, 2011
have a strange problem with evolution attachments: they take ages to save. I just received a 7 MB daily and it took about 3 minutes (!) until it completed the saving process.to be clear, the problem isn't downloading the email with the attachment from the mailserver. the problem exists AFTER the email has been downloaded from the server to my evolution inbox and I try to use the "save as..." option.it almost looks like evolution is trying to "download" the file from my local harddrive to my local harddrive (yes, this sentence is correct), and it's doing that at extremely low speed.
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Feb 26, 2010
FC12/KDE How to do you enter Content-Type in Attachments in thunderbird? I have people sending me pictures I can't open in Thunderbird , it wants me to "Save" them, that has a Content-Type of Octet-Stream and I want enter Gwenview to view this Content-Type. There is no "Options" in the "Tools" window.
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Jun 29, 2010
I'm using Thunderbird 3.x on Ubuntu (Linux). When I save an attachment to my computer, the file gets saved with only the owner (me) having read/write permissions. In other words, the file gets saved as -rw
Frequently, I want my group to have permission, or to give read permission to everyone. Is there a way to do change Thunderbird's default file permissions so I don't have to do this manually every time?
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Dec 17, 2010
I'm am not remotely familiar with the linux operating sytem and just need a simple 'cut and paste solution' that will allow me to send .gz files as mail attachments, from the command line.Recently I moved my website to new hosting company, they are using cpanel and I have set up a couple of commands; the cpanel scheduler runs them for me as required.
1.creates an mysql dump and saves it to folder ( in root of my space )Works fine.2. delete the file created above, after 15 mins. Also works fineWhat I really want to do is email the .gz to myself before it is deleted, this is were I am stuck.This is possible ( I believe ) but it is beyond my understanding and ability to write the scipt/command that will make this happen.Please make any instructions really simple and clear as I am really new to this.on the server and this information is provided below and may be helpful to you (but I certainly to not know anything about this type of stuff)
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