SUMMARY: When we published this article in our MarketingSherpa newsletter yesterday, we got a phone call from a reader. "Hey, my email vendor uses a sniffer; I'm sure they do." No, they do not. Yes, we know that is what the sales rep told you. But, it turns out there is no such thing as an email sniffer.
Get a reality check, plus email deliverability suggestions from this article by our Tech Columnist Alexis Gutzman. Then forward it to whoever handles your outbound email.