for .NET 9/8/7/6/5, .NET Framework 3.5-4.8.1, .NET Core 3.1, Xamarin.Android, Xamarin.iOS and Mono
SMTP, IMAP, POP3, MS Graph API, EWS. Secured by TLS 1.3/1.2. Email processing. S/MIME signing and encryption. RSA/OAEP and RSA/PSS. Outlook MSG format.