Deliverability

Microsoft (NEW — 25 inboxes/domain):

• Warmup: 10–16/day, Ramp Up: 2, Reply Rate: 65–75%
• Sending: 5–10 cold/day, 10-min gap

Microsoft (OLD — 49 inboxes/domain):

• Warmup: 6–8/day, No ramp, Reply Rate: 65–75%
• Sending: 2–5 cold/day, 20-min gap

Google:

• Warmup 14 days first: 30–35/day, 65–75% reply rate
• After 14 days: 15–25 cold/day (recommended 20), warmup 30–35 continued

SMTP:

• Warmup 14 days first: 20/day, 65–75% reply rate
• After 14 days: 7–10 cold/day, warmup 20 continued