Earlier this year we quietly switched the infrastructure that forwards ${author}@cpan.org email addresses from our home-grown solution to Pobox’s Bulk Forwarding system. Our system wasn’t keeping up with the spam-filtering needs of these widely published email addresses.
Pobox is now detecting over 93% of the incoming email to @cpan.org as spam and taking care of it. That’s tens of thousands of spam emails a day that aren’t forwarded on. (Almost 2.5 million emails a month!) Said another way -- less than 7% of emails sent to @cpan.org are valid!
Beyond improved spam filtering, there’s also better forwarding due to support for SRS (for SPF) and ARC-Seals for DMARC. (The email is less likely to be rejected by the recipient mail server.)
On behalf of all the CPAN authors, we’d like to thank Pobox.com (part of the Fastmail family) for providing us this amazing service.
What spam filtering software are they using?
ReplyDeleteIt's a mix of things, including in-house code, a bunch of the usual DNS block lists, Vade, and a pinch of salt. This may well change over time, based on what becomes or ceases to be effective.
ReplyDelete