ImapClient Inbox: SearchQuery.FromContains, SearchQuery.SubjectContains invalid

[zyz]

Describe the bug A clear and concise description of what the bug is.

Platform (please complete the following information):

• OS: [Windows 11]
• .NET Runtime: [.NET]
• .NET Framework: [.NET 9.0, .NET 4.8]
• MailKit Version: [4.8.0]

Expected behavior Receive messages contained by a specified sender or subject.

using (var client = new ImapClient())
{
    await client.ConnectAsync(host, port, useSsl);
    await client.AuthenticateAsync(email, password);
    var inbox = client.Inbox;
    await inbox.OpenAsync(FolderAccess.ReadOnly);
    var uids = await inbox.SearchAsync(SearchQuery.FromContains(sender));
    await client.DisconnectAsync(true); 
}

Note: if the protocol log contains sensitive information, feel free to email it to me at jestedfa@microsoft.com instead of including it in the GitHub issue.

Additional context Add any other context about the problem here.

[jstedfast]

What's the issue?