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by mwexler 5215 days ago
The problem with attachments is that you increase the bandwidth on the sender. So, instead of, say, the sender spending 2k bandwidth per mail and each recpient another 60k on bandwidth to get images when opened, the sender pays for all that extra imagery bytes. It may shift the cost in a way you prefer, but it also slows down the send so users may not get their mails in a reasonable time, and may not appreciate the larger mails filling up their boxes.

There is also the issue with referencing the inline images, though I've been told that it's not such a big deal (I've never tried it myself).

As for the "going down", most reputable email vendors have pretty well done image servers, for this very reason. But yes, if the user disconnects, the images won't be available. But same with the web site that the email is linked to, so users couldn't necessarily click for more info either.

But commercial emails usually aren't designed to be saved and re-referenced like mails from friends. Instead, they expect to be read while online, and either reacted to quickly or discarded. I guess it's similar to the mindset with paper mail.

Too bad there isn't more effort on making better mails that don't rely on images but instead make better experiences... instead of better tracking tech.
1 comments
icebraining 5215 days ago
The problem with attachments is that you increase the bandwidth on the sender. So, instead of, say, the sender spending 2k bandwidth per mail and each recpient another 60k on bandwidth to get images when opened, the sender pays for all that extra imagery bytes.

But wouldn't the sender have to serve the images over HTTP anyway? Unless you expect a big percentage of those emails to never be opened, but then I have to wonder if you should be sending them in the first place.

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mwexler 5215 days ago
Yeah, not everyone opens the mail, so the recipient shouldn't have to deal with the larger download (and the sender doesn't have to send a larger mail), and also, the opens are more distributed over time (for the most part, depending on when you send and to whom), so you can send the smaller mails faster but have a more even distribution of bandwidth as the opens occur across a longer period.
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