I am admin of a couple of mailing lists, I have noticed the same suspicious activity from aol addresses. Only subscriptions for now.

Ċ½eljko

On Mon, May 7, 2018 at 12:07 PM, KuboF Hromoslav <kubof.hromoslav@gmail.com> wrote:
Hi there.

On the lists "wikimedia-sk" and "wikimedia-sk-oznamy", where I am admin, we have received suspicious mass subscriptions (several tens in several hours). They came from nowhere, all with @aol.com address (very unusual for our target group) and all declared only first name. Most certainly some bot.

Provisionally I have set them all for moderation. Eventually I could block subscriptions from @aol.com addresses (no too big deal, because hardly someone real in our audience is using them) but I prefer systemic solutions and not to cure symptoms. And possibly someone else here is running into the same problem.

Any suggestions?

Regards!
KuboF Hromoslav

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