For Newsletter-Ads, an <img> tag must be included for each ad, which is enclosed by an <a> tag. The source URL of the image (src) and the target URL of the link (href) must also have the same parameter signature.
If several advertisements are to be placed in a newsletter, then the signature of the respective blocks differs by the parameter "rank", which must then be counted up from 1 starting per advertisement.
<a href="https://d.adup-tech.com/newsletter/?[PARAMETER]"> <img src="https://d.adup-tech.com/newsletter/ad.jpg?[PARAMETER]" border="0" alt="" /> </a>