Why shared SMTP relays hurt deliverability once you scale
Learn why shared SMTP relay deliverability drops as your email volume grows, and when to switch to a dedicated IP on a Vietnam VPS.
Operations
Warming up a new sending IP: a realistic 30-day schedule
Learn the correct 30-day IP warmup schedule for email sending. A day-by-day volume table, technical commands, and real-world advice to protect your sender reputation.
Operations
A clean dedicated IP for outbound email: what clean actually means
Learn what a clean dedicated IP for outbound email really means: no blacklist history, proper rDNS, isolated reputation. Essential reading for anyone operating a self-hosted mail server.