Answers
One question per page, answered in the first paragraph, then the detail behind the answer. Every number is one a provider publishes or one we send against, and the sources are linked.
Why are my cold emails going to spam?
Five causes in order of weight, and content is the fifth of five.
How many inboxes per domain?
Two, three at the most, and the arithmetic for any daily target.
How long does email warm-up take?
Two to three weeks, with the ramp week by week and why the published answers disagree.
Google Workspace or Microsoft 365?
What each is better at, the published limits, and what a hundred mailboxes costs on each.
How do agencies run cold email for many clients?
Separation at four levels, fleet sizing, and per-client cost at five vendors.
How much does cold email software cost?
Entry prices from eight vendors, and why the software is about five percent of the bill.