Keywords: e-mail, email, mail, sign, encrypt, decrypt, verify, signature, client, server, certificate, impersonate, pfx, cer, des, smtp, pop, pop3, imap, imap4, ssl, tls, mime, smime, s/mime, domainkeys, dkim, asp, asp.net, vb, vb.net, c#, .net, dotnet, compact, mobile, component, dll

MailBee.NET Security classes enable .NET applications to sign, verify, encrypt, decrypt e-mails, work with DomainKeys/DKIM, S/MIME, SSL/TLS, public and private certificates (including PFX), use MailBee.NET SMTP/POP3/IMAP components to connect to secure mail servers (like Gmail and MS Exchange) in both dedicated and StartTLS modes, use Windows impersonation. FIPS 140-2 compatible.

These classes are intended to be used with other MailBee.NET components. MailBee.NET Security acts as a set of helper classes which adds more features to the core MailBee.NET functionality.

DomainKeys/DKIM and SSL/TLS support is available at no additional cost, only the corresponding MailBee.NET SMTP/POP3/IMAP license is required. Using certificates and S/MIME does require separate MailBee.NET Security license.

The key features:
- SSL/TLS connections with mail servers, up to TLS 1.2;
- connections to dedicated SSL ports and to regular ports (STARTTLS);
- client and server certificates;
- validation of server certificate;
- certificate and certificate store management (reading from or saving into a file, registry, memory, etc);
- enumerating and finding certificates in certificate stores;
- private/PFX certificates;
- digital signatures;
- S/MIME: sign, verify, encrypt, decrypt messages;
- security algorithms, CryptoServiceProviders, etc;
- DomainKeys anti-spam technology (creating and verifying DomainKeys and DKIM signatures);
- impersonation;
- integration with Smtp, Pop3, Imap and MailMessage components of MailBee.NET Objects suite;
- error handling features.

The assembly DLL is completely written in C# (no external COM dependencies). Supports .NET 2.0/3.0/3.5/4.0/4.5/4.6/4.7 (including Client Profile) and .NET Core 1.0/1.1/2.0 (partially), both 32-bit and 64-bit. Also supports Xamarin (Mono on Linux, iOS, Android) and UWP (partially).

Samples are available for C# and VB.NET, WinForms and ASP.NET.

Royalty-free distribution allowed.