[Koha] Having trouble posting to listserv!

The results of your email command are provided below. Attached is your original message. - Results: Ignoring non-text/plain MIME parts - Unprocessed: using buttons and links. I am wondering if I can create these in html = myself but I am not sure how to apply them in the admin OpacNav of 3.0. = Can anyone give me advice? Lee in Butte MT