Hey-ho 👋

What is the best approach for selfhosting an email server with static IP or blocked port 25?

I’ve done it many times in many different ways, now doing it again and want to hear what is the best approach these days

My port 25 isn’t even probably blocked, I just prefer to use my vps to help it with this stuff

Any suggestions?

  • bartolomeo@suppo.fiEnglish
    1·
    11 months ago

    react to email running in their networks.

    Is email dangerous? (I have no idea how email works so please don’t bombard me with acronyms)

    • atzanteolEnglish
      2·
      11 months ago

      It’s spam they’re concerned about. Spam email is kinda “big business” and one way they thrive is by using bots to just scan for poorly-configured or vulnerable systems to hack and install an app that will let them send email from your system. By compromising hundreds or thousands of individual machines it makes it hard for mail providers to block them individually. It also uses a ton of bandwidth on internet service providers networks.

      So some time ago service providers started to simply block port 25 (used to send email) on their networks except to certain services. I think they’ve backed off a bit now but inbound port 25 can often be blocked still. It may even be against their TOS in some cases.