On Aug 28, 2015, at 6:00 PM, Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > The only way I've found in the past that is not total waste of > my time is: block e-mail from the whole block of IPs of that provider. Blocking all of digitalocean.com? I guess that’s fine if you don’t mind having mostly false negatives. You’d be better off teaching your antispam system to treat the netblock with more suspicion. The spam I got had enough other rules that it was already in the “maybe spam” score, I bet if I created a spamassasin rule for it, it’d push it over the top. -- Jonathan Billings <billings at negate.org>