I am able to send emails with images using PHPMailer, but now I would like to rotate some of the images from landscape to portrait. Is it possible to rotate images using CSS in the email?
According to Campaign Monitor, the CSS transform:rotate() property is not supported in the majority of the top Desktop, Mobile, and Webmail email clients.
Instead, a more dependable method would be to simply rotate the images manually in advance, or use the PHP function imagerotate() to rotate the images to landscape programmatically before sending the email.