Thanks for asking here! For your question, we're sorry to inform you that Trend Micro currently doesn't provide the feature of encrypted email. If you want to send encrypted email, Outlook and web mail services like Gmail have encryption as a feature. Please check their online help for more detail. Alternatively, we suggest compressing the file using software like ZIP, 7ZIP or WinRAR and add a password before sending. Thank you!
Thanks and please let us know if you have more questions!