We have recently started to use zammad, sending e-mails in plain text would be nice to have!
Another thing that may or may not be related is the viewing of mails and notes in the zammad ticket, there doesn’t seem to be an easy way to view the source of the e-mail in plain text, or just a plain-text representation of the message or note. Downloading the .eml file is not the same and much less useful than just having a plain (and in monospaced font) view of the message…