I got 700,000 spam registrations on my website. Obviously, a bot attack. The captcha has been defeated. "What plugin should I use to better deal with spam registrations" is a question for another day.
Right now, I have these 700k trash emails in ow_watchdog_email_list database table. Is this table anything like Drupal's watchdog table? I suppose these emails have not confirmed their email IDs, so they have not shifted over into the legit account tables. So can I just delete the rows in these tables? Is that safe or will it affect the site in any way (will it affect any legit accounts)?
Left like this, that table may slow down my site. Thanks for your time.