This tutorial is going to show you how to set up Postfix SMTP relay with Mailjet on Debian. Postfix is a popular open-source SMTP server. Previously I wrote an article how to quickly set up your own email server on Debian with Modoboa, which helped a lot of readers run their own email server.

However, some readers told me that port 25 is blocked by hosting provider or ISP as a way to control email spam, so they couldn’t send email. Vultr would unblock port 25 if you ask them to, and Hostwinds doesn’t block port 25 at all, so I recommend using Hostwinds VPS. Some other hosting providers or ISPs like DigitalOcean would not unblock port 25, so what can you do to bypass this blocking, if you can’t or don’t want to change your hosting provider?

#debian #debian server #linux #mailjet #postfix #smtp relay