Developing HTML email newsletter, refreshing Apple Mail

Question

I'm developing an HTML newsletter system using PHP & PEAR. It sends out the emails fine.

However I cannot force Apple Mail to reload images from the server. I have tried:

• Restarting Mail
• Clear ~/Library/MailDownloads
• Clear ~/Library/Cache/Mail
• Empty Safari cache

Does any one know where Apple Mail caches the images ?

Answer 1

Is adding a dummy query string to all image URLs an option for you?

<img src="http://example.com/images/hello.png?343882881923"/>

You'd simply update the query string to prevent the cached image from being used.

Answer 2

You could use OnyX to clear all apps cache and also tune up other aspects of the OS.