Blocking all Email from Bulk Email Senders

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Thanks for the clarification.

> So really these companies cater almost exclusively to businesses which are too small to actually manage bulk emailing, but who want to send their newsletter or whatever garbage to everyone on the internet. Screw those people.

This is just not true. Almost no major company develops or hosts their own email marketing. Both Microsoft and Apple use ExactTarget, for example, a major ESP which was recently bought by SalesForce.

This whole post is pointless. Professional bulk senders honor opt-outs because their entire business depends on staying in the good graces of ISPs and blacklists. So if you know an email is coming from Constant Contact, then you also know that you can trust the opt-out link--so just click it.

Or just block any email with the word "unsubscribe" in the body. You will of course have a hell of a time white-listing addresses you do mean to get emails from.