Use this tool to find the codes of your devices and to get specific instructions on programming the codes into your Comcast remote.
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How are you trying to attach the file? What happens when you try? Are you getting any error messages? If so, what are they? Is this in webmail or an email client such as Outlook, Windows Live Mail, etc?
Is this happening in residential webmail? This is what I see:
I'm closing this thread so that your question is in only ONE post.
Alerts are an easy, quick way to manage your account and get information - like payment confirmations and your current balance.