Oh my God. Thank you for this. Please ignore any sarcasm/negativity; this is so helpful. I was just in the process of building almost this exact same thing for a client, but kept putting it off--partly because I couldn't believe it didn't already exist. Now it does! (For anyone wondering what it's good for, HTML e-mails are a requirement for any non-hacker oriented marketing endeavour and lots of companies are unable to use ie. MailChimp due to ie. security policy or just legacy CRMs.)
Please tell me that I (or ideally, a designer) will be able to save it at the "chopped up" stage so that the kind old ladies who work for my client will only have to click pictures to switch them and type in boxes to change that. Also, do you host the images too?
Thanks. I was in exactly the same position as you, I looked for ages for a web app chops up images and writes HTML but there was nothing. So I built Mailrox.
You can currently save, duplicate and override emails and designs so it's easy to upload a new one over some existing slices. However the exact functionality you're talking about (swapping out images in a cell) is coming very soon. (You can pop in a support ticket/idea if there's anything else you'd like to see, I've just put your request in as a new feature request.)
Currently the images are only exportable in the downloads area (they're all neatly packaged up for you!) because image hosting might have been open to abuse, but it's certainly something we're thinking about for the future.
"lots of companies are unable to use ie. MailChimp due to ie. security policy"
Lots of us don't use mailchimp or constantcontact due not to security but to their privacy policies. Selling every read and click to a group of big-data "associates" (i.e., monetized spyware companies) is questionable customer relations.
Please tell me that I (or ideally, a designer) will be able to save it at the "chopped up" stage so that the kind old ladies who work for my client will only have to click pictures to switch them and type in boxes to change that. Also, do you host the images too?