I want to know how to setup a mail server like postfix on Google VP instance.

I'm running Ubuntu 16.04 (and LAMP stack) and can't get the mail server to send email from website.

I have installed postfix, and opened port 25, but no luck.

Any ideas on how to proceed?

Error logs: Network is unreachable and Connection timed out


According to https://cloud.google.com/compute/docs/tutorials/sending-mail/, you cannot set up a mail server the usual way, as ports 25, 465 and 587 are blocked for outbound connections on Google Cloud. Instead, you might take a look at relaying services such as Mailgun or SendGrid, which allow sending through port 2525 or an API instead. These services might cost a little bit of money, however.

  • 1
    As of today it says only port 25 is blocked. – Lance Pollard Apr 17 at 22:04

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