4 weeks is a safe bet if you're playing it ultra-cautious, but honestly, you can start seeing results sooner if you're smart about it. 3-4 weeks is fine, but don't treat it like gospel.
Three inboxes in parallel works, but I'd argue that's overkill for a newbie. You're better off building reputation on one solid inbox before cloning it. Splitting attention across three from day one just dilutes your warm-up and makes it harder to spot issues. the whole "don't lose reputation" thing is real, but it's easier to manage one stream than three.
domain reputation score is worth watching, but not obsessing over. google's algorithms shift constantly, fixating on that number can lead to paralysis. Instead, focus on engagement metrics-opens, replies, bounces. if those are healthy, the score follows.
Scheduling 2-3 minute gaps per lead is overly conservative. That pace works for manual sends, but if you're using tools, you can batch more aggressively. 20 leads a day is fine starting out, but ramp up faster once you see positive signals. Warm-up in parallel is non-negotiable, though-don't skip that.
The separate domain tip is solid. that's one piece of "common best practice" I won't argue with. Keeps your main site clean if your outreach domain gets flagged. Just make sure you're not using a fresh domain with zero history-warm it up properly.
in short: don't over-engineer the setup. Focus on quality of messaging and list hygiene first. Scale only when the metrics prove it's working.
