It is easy to use, once you log in your email account with MeSince App, the forever free S/MIME certificates will be issued, installed and configured automatically. When you send emails by MeSince, every email will be encrypted, digitally signed and timestamped automatically as default. MeSince provides identity authentication service that can show the sender's identity on the email title which can help to avoid phishing attacks.
Users who have done identity authentication with MeSince can use MeSign - Document digital signing service (Including identity signature, timestamp info, and LTV enabled)for free. Documents signed by MeSign are Adobe Trusted. MeSince has anti-virus features to scan every encrypted email before the user sees the emails, to make sure all the URLs and attachments are secure when users see them.