If you got my email address from a third party, then I do not want to be marketed to.

If you got my email address because I applied for a job, then I do not want to be marketed to.

If you got my email address because I signed up for a service, then I do not want to be marketed to.

If you got my email address because I purchased something, then I do not want to be marketed to.

If you got my email address because someone else "legitimately" entered my email address into your field, then I do not want to be marketed to.

In short: your definition of "legit" likely does not meet my definition of legit. The only email that I deem to be legit is an email that:

1) is @from a domain name that I recognize (walk like a junk, talk like a junk, it's junk) 2) is @from the same domain name as the correspondent (no third party bulk email or proxies; eg mailchimp et al) 3) does not have a no-reply@ as the reply-to address (I must be able to talk to a human) 4) does not hyperlink to third party domains (from@domain must match hyperlinked domain text)

Any legitimate email outside of those parameters are specially treated with liberal amounts of filtering.