This is important to me because the mail serves in a communityproject in which retailers are involved as go between with their customers. As it is not likely that they give us their adresses for Mailchimp I have to ask them to forward the mail.
But when Outlook is involved I am at risk to get a very bad result, which is no good for the exposure of the project.
Did you encouter this problem also? And if so, do you have knowledge of a solution?