Every few months someone asks a version of the same question: is there a shortcut to email reputation? A way to make a fresh sending domain look established, so cold outreach lands in the inbox instead of the spam folder? A whole industry sells answers—aged domains, warmup networks, rotation tools, "deliverability" services. Almost all of them work for a while and then stop working.
This is a companion discussion topic for the original entry at https://namefi.io/r/en/blog/email-sender-reputation-arms-race