public ReplaceUriWithCidHandler OnReplaceUriWithCid { get; set; }

Public Property OnReplaceUriWithCid As ReplaceUriWithCidHandler
	Get
	Set

using System;
using MailBee;
using MailBee.Mime;

class Sample
{
    static bool SkipSecureResources(string uri)
    {
        if (uri.ToLower().StartsWith("https:"))
        {
            return false;
        }
        return true;
    }

    static void Main(string[] args)
    {
        MailMessage msg = new MailMessage();

        // Set the delegate and import HTML with related resources. All the references starting with "https:"
        // will be left intact. Other references will be replaced with CIDs generated by MailBee and the files
        // mentioned by these references will be attaced to the message. Each attachment will have Content-ID
        // equal to the corresponding CID in the HTML body.
        msg.Builder.OnReplaceUriWithCid = new ReplaceUriWithCidHandler(SkipSecureResources);
        msg.LoadBodyText(@"C:\Temp\test.html", MessageBodyType.Html, null,
            ImportBodyOptions.ImportRelatedFiles | ImportBodyOptions.ImportRelatedFilesFromUris);

        msg.SaveMessage(@"C:\Temp\test.eml");
    }
}

Imports System
Imports MailBee
Imports MailBee.Mime

Class Sample
    Shared Function SkipSecureResources(ByVal uri As String) As Boolean
        If uri.ToLower().StartsWith("https:") Then
            Return False
        End If
        Return True
    End Function

    Shared Sub Main(ByVal args() As String)
        Dim msg As MailMessage = New MailMessage() 

        ' Set the delegate and import HTML with related resources. All the references starting with "https:"
        ' will be left intact. Other references will be replaced with CIDs generated by MailBee and the files
        ' mentioned by these references will be attaced to the message. Each attachment will have Content-ID
        ' equal to the corresponding CID in the HTML body.
        msg.Builder.OnReplaceUriWithCid = AddressOf SkipSecureResources
        msg.LoadBodyText("C:\Temp\test.html", MessageBodyType.Html, Nothing, _
            ImportBodyOptions.ImportRelatedFiles Or ImportBodyOptions.ImportRelatedFilesFromUris)

        msg.SaveMessage("C:\Temp\test.eml")
    End Sub
End Class