AlexOrlov 

A set of e-mail components which implement IMAP, SMTP, POP3, Exchange Web Services, SSL/TLS support, parsing and building MIME and S/MIME messages, Outlook .MSG and .PST conversions, mail merge over database, OAuth 2.0, DNS MX lookup, e-mail address validation, parsing winmail.dat, bounced messages... More information

A wrapper around Managed EWS API which lets MailBee.NET-enabled applications to work with EWS the same way they do with other e-mail protocols. Supports .NET Framework 3.5 and newer, .NET Core 2.0 and newer, .NET Standard 2.0 and newer, UWP, Xamarin.

A library which can parse and build iCal and vCard items. It's mainly intended for use with MailBee.NET Objects. Supports .NET Framework 2.0-4.6.

A component which transforms HTML into PDF documents. For conversion, the component uses iTextSharp 4.1.6 and HtmlAgilityPack 1.4.9.5 libraries. Supports .NET Framework only (.NET Core, .NET Standard, UWP, Xamarin not supported).