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(.NET Core C#) Yahoo! IMAP (imap.mail.yahoo.com)

(from Wikipedia)

It is possible to get direct IMAP access without signing up for paid access nor using software like YPOPs! or FreePOPs. Yahoo! operates IMAP and secure IMAP servers (imap.mail.yahoo.com in particular), which are globally accessible. However they require a specific, non-standard IMAP command to be sent before login is done, namely: “ID ("GUID" "1")”.
This example demonstrates sending the non-standard IMAP command after connecting but before login.

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Imap imap = new Chilkat.Imap();

// Connect to they Yahoo! IMAP server.
imap.Port = 993;
imap.Ssl = true;
bool success = imap.Connect("imap.mail.yahoo.com");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Send the non-standard ID command...
string rawResponse;
rawResponse = imap.SendRawCommand("ID (\"GUID\" \"1\")");
if (imap.LastMethodSuccess != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Login
success = imap.Login("myLogin","myPassword");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

Debug.WriteLine("Login Success!");

// Select an IMAP mailbox
success = imap.SelectMailbox("Inbox");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Continue with whatever you wish to do...
// (see other examples..)

// Disconnect from the IMAP server.
success = imap.Disconnect();

 

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