I need to send email notifications to my subscribers, but I can’t do it because of the timeout error.
Please i need to know if it is possible to open port 25 and send emails?

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1 answer

Hi @redouanadmer,

Firstly, please make sure you a Mail Service which can send mails. If you are uncertain which one, I’ll recommend using Postfix. DigitalOcean have a pretty good tutorial on the installation and configuration of said Postfix. You can view it here - https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-16-04

Now onto the port. If you are using ufw, to open port 25 you can use the following command

sudo ufw allow 25/tcp

If you are using Iptables, you can use the bellow

iptables -I INPUT -p tcp -m tcp --dport 25 -j ACCEPT


by finid
Postfix is a *mail transfer agent* (MTA), an application used to send and receive email. In this tutorial, we will install and configure Postfix so that it can be used to send emails by local applications only — that is, those installed on the same server that Postfix is installed on.
  • It’s not about how to setup Postfix. The OP is facing a problem many of us are facing where DigitalOcean blocks ports like 25, 465 and 587 to be used in Droplets account-wide.

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