Made shared account on InterServer last month sir, wanted learn mail server. They block port 25, also 587, also 465. Tried submit port 2525 but they filter that too. Found they not block 10025 on Vultr shared plan bro, so I tunnel through there with ssh. Postfix running now, sending ok, not blacklisted yet. I know everyone say "dont do this" but I want write guide for other learner. Thank you very much sir for any warning you have. 🙏
traffic worse than my packet loss