Guidelines for email newsletter service
I'm implementing a email newsletter sender service using .NET and Windows Server technologies. Are there comprehensive guidelines which could help avoiding emails being trapped by spam filters and other mechanisms? They should cover all aspects of (legal) bulk mail sending: SMTP configuration, DNS, HTML content, images, links within content etc. A simple example: is it better to embed images or load them from a server? It would be great if you could provide some empirical data to show the efficiency of some measures taken. Although I don't have a definitive answer, I think this is a very