It should be well known among responsibly acting software vendors that HTML e-mails pose a serious risk for IT security. Anyone who sends HTML e-mails (even such containing a plain text layer) tempts recipients unaware of this risk to do take potentially risky actions in their e-mail client. We as a library should be able to opt-out from tempting our users to do potentially risky things so please add a configuration option to make Alma send plain text only messages.