There are a group of users filling out a form on my site that gets emailed to me. They all have email accounts on Yandex.com. Their IP addresses are also in the email. I’m pretty sure they think it will add their comment to the post; fortunately it does not. However, my form emails me their comments (as well as the other 2 people I specified on the form) and they are all for the same products.
I think if I mark these emails as SPAM, I won’t get legitimate emails from the form, right?
Is there anyway, for me or WordPress, to block visitors from certain IP addresses or email providers? If so, how can I report this to WordPress?