Chris Chapman chapman at simplesrv.com
Tue Jun 16 16:38:21 UTC 2015

It would have to be a web bug or maybe an AJAX post to MailChimp. But AJAX assumes javascript in the mail client so, I certainly doubt that. It *could* also be a serialized name convention for an external css file I suppose. But I’ve found external css files in email to be sketchy at best. Most likely a simple web bug.

Chris Chapman
chapman at simplesrv.com

> On Jun 16, 2015, at 11:33 AM, Mark Sapiro <mark at msapiro.net> wrote:
> On 06/16/2015 09:15 AM, Chris Chapman wrote:
>> Having just watched the absolutely cringe-worthy video on webhooks.org
>> <http://webhooks.org>, this is indeed what is going on. The service
>> (such as mailchimp) tracks all the response information - bounces,
>> opens, etc. Then it sends an http(s) post to your script on your server
>> for various events. You set different URLs to receive post content for
>> these events.
> I don't have enough patience to watch the video, but my question is how
> does mailchimp/whatever actually track the 'open'. Is this via the
> standard web bug that we already deal with, via some modified web bug
> such as an html stylesheet reference rather than a 1x1 transparent
> image, or via some 'new' mechanism?
> -- 
> Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
> San Francisco Bay Area, California    better use your sense - B. Dylan
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