Is it just us, or it got harder to deliver to yahoo?
We were delivering 50k emails per ip to yahoo without any issues but all of the sudden things changed and became quite a challenge to deliver.
We've been getting TSS04 messages on all the ips.
We've checked our fbls, bounces, unsubscribes but everything looks ok.
We've tried pausing the mail for a couple of hours, lowering sending speed, adding new ips but nothing worked.
Anyone else experiencing the same?
Any advice on what we could do to resolve this?
Thank you.