Don't most other providers already do single opt-in by default already anyway? Really, MailChimp is just sinking to their level. It's not all of the sudden worse than alternatives, right?
> Don't most other providers already do single opt-in by default already anyway?
Yes, most others have already switched to single opt-in.
> It's not all of the sudden worse than alternatives, right?
No, they aren't all of a sudden worse than the alternatives. They were already worse and they're certainly not going to improve as a result of this change.
I manage several e-mail servers and will be watching very closely -- even more so than usual -- the amount of spam coming from MailChimp. I usually start out by blacklisting individual IP addresses but if this becomes a big problem, I will simply blacklist them entirely and be done with it.
I've had two "incidents" in the last week or so with MailChimp that they have shown little interest in "fixing" (unrelated to this change) so I'm already inclined to do exactly that.
