On Thursday, Dec 12, 2002, at 08:37 US/Pacific, Theo Van Dinter wrote:
When someone subscribes, send them an email requesting confirmation (and include some large random number in the message, which they must use as a confirmation, so as to avoid people guessing what the confirmation code might be). Until they successfully confirm, do not send that email address _ANY_ other messages. Maybe give them one follow up "hey, did you miss the confirmation?" and that's it.As an example, things I was thinking about were: - Choose good 'from' addresses - Choose descriptive and non-spammy-looking subjects - Include clear information about why the person is receiving the newsletter and how to change their preferences. - Make sure the hosts sending the mail have proper PTR (DNS) records - Make sure that the PTR records resolve to the appropriate domain - Handle out-of-band unsubscribe requests quickly, and respond when finished (and explain that there may be some messages sent before the unsubscribe, but waiting to be delivered...)
I personally consider "unconfirmed opt-in mailing lists" to be as bad as opt-out lists, and I have no conflicted feelings about blacklisting those people ... they may not be spammers, but they're only one layer of scum away from the bottom of the same barrel. Now, my hatred for unconfirmed opt-in lists probably comes from my home domain being 'domain.org', and all of the lists I get signed up for by random idiots around the net. But, frankly, not getting confirmation is just not doing 'due diligence'. If the list owner isn't acting responsibly (which includes seeking proper confirmation), they deserve to be blacklisted (personally and/or publicly).
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