SMTP

Solve common errors encountered when sending an email using the Google SMTP server. C# sample code included.

Learn how to send an email using the Gmail SMTP server. First, connect using a TLS-encrypted channel. Then, authenticate using App Passwords or OAuth. C# sample code included.

Logging to Gmail via IMAP using your Google password doesn't work anymore. You have to use App Password instead. Learn how to generate App Passwords and use them in your C# code.

How to enable IMAP or POP3 access to a Gmail account. Resolving the "password incorrect" error using App Passwords or OAuth 2.0.

This article provides step-by-step guides to making it all work (in delegated mode with a signed-in user).

Describes how to register a desktop or mobile application using delegated access.

What’s common for FTP, POP3, IMAP, SMTP, HTTP? All those protocols share same method for encryption of communication between client and server – the TLS/SSL. TLS is just a new name for SSL version 3.1 (for details see KB article about Secure FTP). The ...

We have just released a .NET Compact Framework edition of Rebex Secure Mail, our mail SMTP, POP3, IMAP an MIME component. With the CF version, you can use all the features of Rebex Secure Mail on Windows Mobile and Pocket PC devices. Samples in C # ...

Question Many mail agents including Outlook support sending email from one user on behalf of another one. When you reply to such message, the response is sent to the user on whose behalf the message it was sent. One of the usage scenarios is a support ...