Stefan Kaltenbrunner <stefan@kaltenbrunner.cc> writes: > Unsigned mails(these days SPF, DKIM and DMARFC are not optional any > more) are basically undeliverable at scale to all large mail providers > other than if you are a super low volume sender - so that is a complete > non-starter for us.
Yeah. The key point here is that we are not constrained only by what it says in the RFCs. We have to stay on the good side of the anti-spam policies at gmail and other large email providers, or we'll be blocked from delivering to large swaths of our user base.
Yes, indeed.
At one point not too long ago we had something like 60+% of our emails to gmail getting delayed or dropped, leaving us with delivery queues exceeding I think 2 million emails to gmail based destinations. Implementing this DKIM fix is one of the things we did to get off that list...
