macOS Mojave Mail still ignores a body font for outgoing emails. Rich Text emails show up with Times New Roman font on Windows Outlook clients. Mail does not set a font type, Thus, Windows Outlook uses its default paragraph formatting which falls back to Times New Roman. It's so unprofessional and embarrassing
Using plain text seems to be the only solution. Big downside: No bolding, no highlighting. This has been an ongoing issue since years. There used to be a great plugin called Universal Mailer which is no longer developed.
Any workaround for Apple Mail Mojave and Catalina? I highly appreciate any solution.