Why Is My PHP Email Sending Failing with a 'localhost' SMTP Connection Error?

SMTP Connection Error with localhost

When attempting to send an email using PHP, you might encounter the following error:

Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in C:\wamp\www\dressoholic\register.php on line 50

Root Cause and Solution:

The error message indicates that PHP was unable to connect to a mail server running on your local machine. This typically happens because you do not have a mail server configured locally.

To resolve this issue, you need to install and run a mail server on your laptop.

Installation Instructions:

Unix:

• Enable the Sendmail service. Instructions for your specific distribution can be found online.

Windows:

• Install the Simple Mail Transfer Server (SMTP) component of Internet Information Services (IIS).
• Follow the steps provided in this Microsoft documentation: https://msdn.microsoft.com/en-us/library/8b83ac7t.aspx

Once you have installed and configured a mail server, verify that it is running correctly. You may need to adjust the firewall settings to allow incoming SMTP connections.

After confirming that the mail server is working, adjust your PHP configuration in php.ini:

SMTP = localhost
smtp_port = 25

Restart your web server and try sending the email again. The error should be resolved after you have properly configured and enabled a mail server on your local machine.

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