Hi,
We're looking for the best way to integrate dynamic content into emails sent by various individuals (or companies) using various mass mailing systems, some of them proprietary.
What are the options to do that and what are the advantages and disadvantages?
For example, I guess that one of the options is to add an iframe to the emails. In this case the url for the iframe content will carry a token which will identify the specific email, and our system will generate the iframe content.
Any advice on the subject is highly appreciated.