# SMTP issue with Postfix **URL:** \ **Category:** Self-hosting\ **Created:** [December 20, 2018, 4:59am UTC](https://meta.discourse.org/t/smtp-issue-with-postfix/104745 "2018-12-20T04:59:16Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![supermathie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/supermathie/32/507518_2.png) [@supermathie](https://meta.discourse.org/u/supermathie)\ **Post date:** [December 21, 2018, 9:41pm UTC](https://meta.discourse.org/t/smtp-issue-with-postfix/104745/5 "2018-12-21T21:41:00Z")
> [@satish](#): > > 33.165.221.244 I’m guessing this is the IP of the server on which Discourse is running, and you also have a local SMTP server? From inside the container can you connect to 33.165.221.244 port 25? If not, you may have better luck using the host’s IP address of the `docker0` bridge instead of the public IP. Can you connect to the host’s `docker0` IP on port 25 from the container? --- _[View the full topic](https://meta.discourse.org/t/smtp-issue-with-postfix/104745)._