Outlook cache/html pages?

[smith15]

I'm sending out a newsletter via PHP that sends a HTML code. Within that code I have a tracking image that reports if the email was opened. (fairly common reporting)

Anyway, if you open the HTML email once, it counts it as opened. If you open it twice, it does not count that. I've tried adding NO CACHE type options to the HTML email itself with no luck. Is it something maybe on the PHP side?

I'd think everytime outlook opened that email it would reload the tracking image, but maybe not.

Has anyone else run into this? Is there a workaround?

Please keep in mind, this isn't for spam and i'm not a spammer, this is for a client who wants to send newsletters to it's subscribers.

Thanks in advance!!

[smith15]

FYI - if I hit refresh within the email window, then it will update the counter as another "open" so I know it's something with cache.

Unfortunately, I'm not finding a good way to clear the cache on outlook or force a refresh everytime, without relying on the client.

🙁

[soarchrist]

Smith,

Ever find a solution? I'm in the same situation. So far I've seen that web apps that read emails (ie, hotmail) don't have the same problem with Outlook. And, refresh re-loads the scripts/images like it should. So I agree it's Outlook's cache.

Please share if you've discovered something.