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Most likely it's an overactive spam filter. We send out forum notifications and newsletters from different servers, which can explain why you get one and not the other. If an ISP blocks an email they often don't say why, since this actually helps spammers.
Have you added us to your whitelist? It may be worth contacting your ISP and seeing what they say.
This is a never ending problem for us since ISPs often use email blacklists that are either out of date or are outright wrong. Of course, for a minor convenience fee we can be removed from some of these blacklists. Until next week, that is. 
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Chris,
I contacted my ISP and discussed the situation. The technician explained that when messages are blocked, an email is returned to the sender with specific information about why the message has been blocked and what can be done to get it unblocked. In order to anything from this end, I would need the IP address of the server that sends out the newsletters and possibly the email address of the sender. Getting my ISP to check its logs requires substantial evidence. Presumably, you have my email address and therefore know who my ISP is. You should be able to find evidence in your logs if the newletter emails are being rejected. Beyond that, you should be able to send a test message from the server and watch the specific response in isolation.
I could use one of my other email addresses (same ISP) or use gmail to see if those options help.
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I've asked Vince to follow up on this and get back to you. We'll see what we can untangle.
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Comcast put us on a block list a little while ago, I have been in contact with them about this and I am trying to get us removed. The orignial report from them was that we sent out too many emails and we sent them out too quickly...It's a good thing the mailers I setup only have 1 gb of ram.
I have been trying to resolve this with comcast directly and hopefully it will be sorted out soon. We actively monitor our PTR, rDNS, Blacklists and other spam related concerns but it is rarely related to any of this. Typically its purely about volume or speed of delivery.
We occaisonally trip AOL and Yahoo as well however they are a bit more sophisticated in that they will throttle our access so eventually everything gets through.
When I hear back from comcast I'll post an update.
Actually as I was typing this I just got a message back saying we were removed... I'll flush the mailqueue's and hopefully they will get through.
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Hmmmm
Your not sending 2,000,000+ e-mails all at once are you? Back in the 1990's I was administering some high-load Unix servers and when I performed daily/weekly mailings to site members I would send A-D and wait 15 minutes then send E-H and so forth to avoid being blacklisted. When you send millions of e-mails all at once there is no way for the recieving end to distinguish a DOS attack from a legitimate mass mailing unless they have white listed the origin IP.
Unfortunately it is easy to spoof the From: e-mail address... so the only way for a systems administrator to 'white list' is to use the IP of the sending server. The addresses contained in the 'Received: from' header can also be spoofed if passing through a relay.
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With many of the big email providers they don't block on the basis of the number of messages per hour or minute or second, but by the concurrent connections. It’s a juggling act here to try and keep our addresses clean to make sure everything gets through. To answer your question though, no we don't send out to everyone at the same time. Although, I sure would like to send them out all at once. 
Yes, Server side whitelisting goes either by domain or more often by IP. Domain and email level whitelisting is still something that needs to happen on the user end though as most places have implemented user defined whitelists. These are typically not done by IP.
modified 26-Mar-12 14:46pm.
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Have noticed 2 comment/discussion blocks appearing for some articles. Here is an example[^].
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum
me, me, me
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Yes, for new versions of existing articles a new forum, specifically to cater to comments on changes of the article is added. There is an explanation above each discussion board that should make this clear, but if the explanation isn't there (or isn't clear) let me know.
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Thanks
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum
me, me, me
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Hi,
I have a problem with the following article ASP.NET MVC3 Razor With JQuery For Beginners[^]. In the edit section, the second code listing (above the picture is cut-off). If you open this link in the edit section you can see that this part of code ends with
@Html.ValidationMessageFor(model =>
there is a code after this statement but it is not generated here. When I go to the article and edit is this code is not cut-off. It seems to me that this > causes some problem where and ends the code on this position.
I have tried to remove this => and replace it with just = . In that case code is continued to the next =>.
This is very strange because I have other parts of code where I have used => but it is now cut-off there.
If you need any additional info let me know.
Thanks,
Jovan
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Hi Jovan,
Did you already fix this on your own? It seems OK to me now. Please let me know if all is well. I suspect it was an angle bracket that was like this: >
instead of this: >
Inside pre blocks our article editor requires the latter.
Thanks,
Sean Ewington
The Code Project
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Our syntax colouriser is getting scared and confused by the lambda notation inside the HTML.
I'll talk to it and calm it down.
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Hello everyone,
I was wondering if Code Project could support pictures, like display them in posts, that would be nice, I mean if people abuse them, there's always that "report the person and let administration ban them from Code Project or take care of it", is it a memory/storage problem for the web masters, I was wondering if any of you'll had ideas like this...
Regards,
Brandon T. H.
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They were supported some time ago, and removed for the very reason you mentioned. Too much trouble, I guess.
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I believe CP only supports photos and videos in articles. You can post links to pictures or videos in other forums.
[edit] If we allowed pictures in CP then anyone could post anything, offensive or not. I'm talking about elephants dancing in the sunshine, if you know what I mean. 
"the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)
"It is the celestial scrotum of good luck!" - Nagy Vilmos (2011)
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I really wish I didn't... 
Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water
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Yeah, my mental eyes are hurting too.
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Chris,
Check out my comments at the bottom of this article; Introducing Visual Studio LightSwitch[^]
Basically, if the video is playing, and your browser client space is less than ~1260px then the right hand Tower ad is over the top of the video, and doesn't go behind like the rest of the text. don't know if you can tweak the zOrder.
Cheers,
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Could I suggest that maybe 1280 is a little too big? 
Not only from a screensize perspective, but also from the point that a smaller screensize will dramatically help member bandwidth issues in downloading the video
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Chris Maunder wrote: Could I suggest that maybe 1280 is a little too big?
You could suggest it........up to you, there is a forum for that
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Dear Bob, could you please...
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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It only just hit me that you weren't the author of that video 
Sorry - I'm wading through an avalanche of email and my brain is short circuiting this morning.
Let me...adjust.
cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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Chris Maunder wrote: It only just hit me that you weren't the author of that video
So you were having a "Magical Mystery Maunder Moment" (aka senior moment)  comes to all!
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cheers,
Chris Maunder
The Code Project | Co-founder
Microsoft C++ MVP
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