On ISC 2018, some users regarded MeSince as a closed system because they think MeSince requires both sides to have MeSince APP installed to send encrypted emails. In fact, this false statement is from those that do not have a S/MIME supported email client.

MeSince complies to the international standard, S/MIME. As displayed in the images below, emails sent from MeSince APP can be deciphered on other S/MIME-supported email clients which include but are not limited to, Outlook (win), Thunderbird (win) and iPhone Mail.