Hello,
that tag is already there. I confirm it’s happening on iOS as well, but only from your site, in our test environments it’s not happening at all. Please try to add the following css to Settings > Advanced:
/* Fix for zoomed-in Newsletter View on Mobile */
@media only screen and (max-width: 768px) {
/* Force the main container and tables to be fluid */
body, table, .newsletter-email {
width: 100% !important;
max-width: 100% !important;
min-width: 0 !important;
}
/* Ensure images shrink to fit */
img {
height: auto !important;
max-width: 100% !important;
}
}
Tell me if that works.