the cold email deliverability stack — every agency needs all 5 layers working
layer 1: dns health — spf, dkim, dmarc green on every sending domain. the floor. non-negotiable.
layer 2: domain reputation — age, history, blacklist status. check weekly minimum.
layer 3: mailbox warmup — 21 days before any campaign send. most agencies rush this.
layer 4: send volume patterns — too fast = spam flags. consistent ramp = trust signals.
layer 5: real-time monitoring — if you're reviewing this monthly you're already 3 weeks behind
most agencies nail layers 1-3 and ignore 4 and 5
that's where campaigns die
save this. then reply with which layer your agency is weakest on
#coldEmail #emailDeliverability #coldEmailTips #outboundSales #agencyGrowth #inboxPlacement