Spam volumes are increasing again

Almost everyone has heard about the takedown of many of the major spam botnets with a general decrease spam volumes in the last years.
Well, spam traffic appears to once again be on the increase in this 2017.
EsvaLabs statistics show a steady increase in spam reports since the beginning of the year with a record of 96,4% spam rate in the last week!
From the above graphic – that summarizes spam rates for this 2017 –  it’s clear that almost all the spam emails have been blocked at SMTP level, thanks to reputation and RFC compliance checks. Yet Esvalabs researchers reported an increase of the percentage of malicious URLs and attachments in unsolicited emails.
The spammers don’t give up easily.