Email domain rotation explained - the real math behind spreading cold-email volume across domains and inboxes to protect reputation without multiplying risk.
Email sending limits in 2026 explained: real Gmail, Outlook, and Workspace daily caps, hard limits vs reputation throttling, and the 2,000/day myth debunked.
Google Workspace vs Microsoft 365 for cold email sending in 2026: deliverability, bulk-sender rules, throttling, cost, setup, and which to pick by use case.
Subdomain vs separate domain for cold email - reputation isolation, brand and legal risk, and which sending setup to pick by team type, explained for 2026.
