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Poco Forums • View topic - Downloading Images

Downloading Images

Help and advice on using PocoMail

Moderators: Eric, Tomas, robin

How can I get the Beta?

Postby ecps » Mon Mar 12, 2007 1:28 am

As requested by Tomas I did send an email with which I was having this problem to Poco support. This was several days ago but I have not heard anything back from them.

As rdwilson states, the images open just fine in Outlook so they are not being blocked on to my PC and they do exist on the server.

I would like to get my hands on the Beta of the next version just to see whether this problem still exists, but I am not clear about how to do this given that I am not going to apply for a registration code until this is sorted out
Last edited by ecps on Mon Mar 12, 2007 6:03 am, edited 1 time in total.
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Postby robin » Mon Mar 12, 2007 2:52 am

The beta version runs as a "limited time" version without a licence code. That gives you 45 days (I think) until it bombs: that should be enough time to check it out. If you already have v4 then the beta will run happily with it.

I don't believe that there is a clash if you have a v3 licence code.

Send a PM to Slaven with your forum username. If selected he'll give you access to the beta section.
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Correction

Postby rdwilson » Mon Mar 12, 2007 4:15 am

I incorrectly said "embedded" images when I actually meant "server-side" images. The images that I have tested are not actually part of the email content but are linked to a server.

<IMG SRC="http://www.sender-company.com/images/flower.jpg">

As opposed to:

<IMG SRC="cid:My-Image-Identifier">

The office that has the new network installed in on limited hours this week because the school district is on Spring Break so I will be able to perform more extensive testing and report back here. Since this is a new installation and I am dealing with computers that can be re-imaged, I have the luxury of being able to dissect them with out dire consequences.

I suspect the Poco is not the problem. I will try to locate an older version of Poco and replace version 4 to see if the problem persists. I doubt that looking at the data stream with a packet sniffer will reveal anything since the "view raw" message contains the correct code but I will give that a try.

As an aside, I just noticed that my personal copy of Pocomail 4 exhibits a similar problem. I never noticed this before because my preference is "Ignore HTML" ( I am old school that believes in RFC 822). There is a slight difference in the missing image icon, mine has a "bang" in a yellow box where the problem machines icon looks like a world.

UPDATE:
I think that I solved the different icon puzzle. The "bang" means intentionally blocked and the "world" means retrieve error. I am intentionally killing HTML and stripping images on my personal machine using a third-party application called "SpamPal". When I bypass SpamPal, the images will download from the server OK.

I gotta run over to the office and begin testing to resolve this problem. More later...
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Re: How can I get the Beta?

Postby Tomas » Mon Mar 12, 2007 10:16 am

ecps wrote:As requested by Tomas I did send an email with which I was having this problem to Poco support. This was several days ago but I have not heard anything back from them.

I only replied original messages, but not to the email sample, as I couldn't find any problem, I'm still keeping the email sample and your configuration.

You said you already tried all the previous suggestions, anyway I will dare to ask whether you didn't omit trying what helped soniajane earlier in the thread: to delete the proxy settings (address, user, password) from your options. Will that help?
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Chasing the Wild Goose and a Final Solution

Postby rdwilson » Fri Mar 16, 2007 4:21 pm

The first test that I performed was using a packet sniffer, Wireshark (formerly Ethereal) to see if Poco was even getting to the TCP/IP stack. My "good" copy would issue a HTTP GET command and the server would respond with the image. In the "bad" installation Poco would not even issue a GET. It was not hitting the stack.

Next I installed a Web proxy on the local machine and had it listen on an different port. I set Poco's network setting to match the proxy. Poco would not hit the proxy. My thinking here was that if some software like A/V or a firewall was blocking port 80 for all but "approved" applications then Poco might be able to download the images on an alternate port. No joy.

Next, I turned to some excellent free diagnostic tools from Winternals. Specifically TCPMon, FileMon and RegMon. TCPMon shows any open ports and the associated application along with it's PID. Poco would show up as expected on ports 25 and 110 but never when requesting a server-side image download.

FileMon will show what files are being accessed by an application. When I ran an image load command I noted that the Cache folder was being assessed. When I checked, it was empty. Curious. Then a light bulb lit up. NTFS file permissions! Of course! After an hour or so of trying different settings including giving the Everyone Group full control I decided that I was wrong.

Still thinking along the lines of security settings I elevated the user that owned the PocoMail4 folder to Administrator and then Domain Admin with the same result of no image downloads.

RegMon didn't show me any thing obviously out of the ordinary save that Poco was not set as the default mailer. I changed that and noted no difference in the image download problem.

I thought is was time to load PocoMail 4.5 BETA to see if it had the same problem. I installed it in a different folder, and imported all of the settings and messages. Images were being pulled down in all of their glory. What gives?

Going back to the original Poco installation I then did an uninstall and just to be sure removed all registry entries as well. Reinstalled PocoMail 4 and it was now working. Registry corruption? I thought so until I saw the "Purchase" option in the upper right hand of the screen. I went over to one of the other non-working computers and checked the registration info. It showed registered but the license key was empty.

Now this was beginning to seem very unusual as the network belongs to a non-profit organization that never registers trialware until it quits working. Their budget is very tight and I donate my time to them to help out whenever I can. This version of PocoMail was less than a week old.

After running a checksum against my "good" Poco.exe and the "bad" Poco.exe I found a discrepancy. I seems that the original had been altered. Someone had applied an illegal crack!

After a bit of investigating, one of the teenagers in the youth group came forward and admitted to applying a patch to register PocoMail. His excuse was that he was trying to save the organization money. While his intent may have been good he didn't realize that he was actually stealing from the software company.

His punishment will fit the crime. He will pay the license fee for all copies of PocoMail (fulfilling his desire to save the organization money) himself. Additional sanctions may also be imposed.

Moral of The Story:
Don't try to cheat. Especially since Pocomail is an extremely good value. A $40 one time fee for an excellent email client is a fair deal.
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Postby robin » Fri Mar 16, 2007 7:51 pm

That is an excellent piece of detective work, and an interesting and valuable outcome. Thanks for letting the rest of us know.
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Reference - Where to find the tools

Postby rdwilson » Sat Mar 17, 2007 6:48 am

I thought that it may be useful to reference the tools that I used so that others may also run their own diagnostics.

Winternals and Sysinternals - established in 1996 by Mark Russinovich (discovered the Sony rootkit) and Bryce Cogswell. Acquired by Microsoft in July 2006. Free tools are still available here:
http://www.microsoft.com/technet/sysint ... fault.mspx

Proxomitron Web Proxy - by Scott R. Lemmon. Scott passed away in 2004 so the software is no longer officially supported. An unofficial web site has been setup and can be found here:
http://proper-random.com/proxo/downloads.php

Wireshark - formerly Ethereal network protocol analyzer. A very powerful and useful tool to capture packets, perform analysis and decode protocols. Main page is here:
http://www.wireshark.org/

SlavaSoft FSUM checksum generator - There are many free checksum tools available on the Web. This command line tool is fast and reliable.
http://www.slavasoft.com/fsum/

Best Regards,
Rick Wilson, MCSE
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Postby robin » Sat Mar 17, 2007 8:46 am

Sysinternals and Wireshark I have used, not the other two.
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Problem resolved - almost.

Postby ecps » Sat Mar 17, 2007 10:17 pm

Tomas wrote:You said you already tried all the previous suggestions, anyway I will dare to ask whether you didn't omit trying what helped soniajane earlier in the thread: to delete the proxy settings (address, user, password) from your options. Will that help?


Yes, I had cleared the proxy settings but still the problem existed. I then downloaded the Beta version and found that if I used my dial-up connection then images downloaded correctly. They still do not display using my network connection but I can live with that. I have now purchased Barca and am delighted with it.
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Postby robin » Sun Mar 18, 2007 12:58 am

That's great to hear, but it does beg the question: why does it work over dial-up but not the network :? ?

If you are interested in taking the investigation further: what does the network connection connect to? Of course, you might be totally happy with it as-is, in which case ignore my question :)
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Postby Tomas » Sun Mar 18, 2007 10:49 am

This is just a wild shot: try this procedure to disable 'Offload Checksum':
http://games.asobrain.com/faq/checksum.php

(I admit I don't know what I'm exactly talking about here, but it was helping in certain (though remotely) similar cases).

If it was on my PC, I would also try to upgrade drivers for related hardware (network adapter,...) to the latest ones.
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Postby ecps » Tue Mar 20, 2007 12:37 pm

Tomas wrote:This is just a wild shot: try this procedure to disable 'Offload Checksum':
http://games.asobrain.com/faq/checksum.php


Thanks for your advice. I tried your suggestion but it made no difference.

I think that the problem is something to do with the Poco set up rather than the network or firewall as images appear in Outlook (from which I have just moved).
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where do I find the preview pane tool bar?

Postby carlajane » Fri Mar 23, 2007 12:57 am

Hello :D

I'm having the same trouble...I can't view images in my e-mail. I have clicked the "Online Operation" but I can't find the "preview pane tool bar" to check my security control settings! Help! I'm missing something here! I'm sure it's quite obvious...could someone tell me where to find it? Thanks so much!

~Carla
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Re: where do I find the preview pane tool bar?

Postby Eric » Fri Mar 23, 2007 1:06 am

Hi Carla & welcome to Poco Forums, :D
carlajane wrote:could someone tell me where to find it?
Have a look here :D

Image
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Thanks!

Postby carlajane » Fri Mar 23, 2007 1:13 am

Hi Eric,

Yaaay! :D

Thank you for the welcome and for the speedy help! I figured it would be simple!! I can now view the images.

Take care,

~Carla
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