Exchange 2007: Transport error when sending emails using TLS (0x80040213)

Ok, this was a fun case and I never had such fun on a CDOSYS case & I am lying. I spent nearly all day in hunting down a Transport failure issue when sending emails using CDOSYS and Exchange 2007 as backend. This was the configuration of the default Receive connector, pretty secured…huh??? Yeah!!! Goal: …

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Exchange 2010: OWA Customization: Preview forms does not works in Conversation Mode

I recently had couple of customer reporting that their existing/new OWA customization code is not working in Preview mode. You will notice the following error message displayed instead.. "This type of message isn’t fully supported in Conversation mode. Click here to open the full version, which may show you more details or features." This same…


System.Net.Mail cannot send secured email using SMTP over SSL aka SMTPS protocol

This is just FYI that we know the limitation of System.Net.Mail classes and its incapability of sending secured emails over SSL / SMTPS. The SmtpClient class only supports the SMTP Service Extension for Secure SMTP over Transport Layer Security as defined in RFC 3207. In this mode, the SMTP session begins on an unencrypted channel,…


HOTFIX: .NET 4.0 (System.Net.Mail) Unable to send emails with large attachments (more than 3MB)

  We have an official release for the issue and if you are facing this problem then I would recommend you contacting PSS and refer to this blog http://blogs.msdn.com/b/vikas/archive/2010/04/05/bug-net-4-0-system-net-mail-unable-to-send-emails-with-large-attachments-more-than-3mb.aspx I am expected it to be released in a public KB in some time but for the time being you can request for the hotfix by…

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