Send mail through SMTP What is Send mail through SMTP?

This module allows to send the mail-messages from phorum (i.e. notifies) through an external SMTP-Server without using PHPs internal mail-function. This is useful for when PHP is not setup to use a local SMTP server, or if you need to use an SMTP server with SSL/TLS or smtp-auth. It is disabled by default. How do I use Send mail through SMTP?

Once you have enabled the module, you need to fill out the details of the SMTP server in the Settings page. If your Phorum is in a shared hosting environment, then your host should have sent them to you when you created your account. If not, ask them.