Why Does My PHP mail() Function Fail with 'Failed to connect to mailserver at 'localhost' port 25'?

"Failed to connect to mailserver at "localhost" port 25" Error in PHP Mail Function

Problem:

When attempting to send an email using the mail() function in PHP, an error message is encountered:

Warning: mail() [function.mail]: 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

Despite the php.ini file being configured as follows:

[mail function]
SMTP = localhost
smtp_port = 25
sendmail_from = [email protected]

Solution:

The error message indicates that a mail server is not running on the local machine, which prevents the mail() function from connecting to a mailserver to send the email.

To resolve this issue, you need to:

• For Unix: Enable the sendmail service.
• For Windows: Install the Simple Mail Transfer Server (SMTP) component of Internet Information Services (IIS).

Windows Specific Instructions:

For Windows 2003:

1. Go to the Control Panel.
2. Click on the "Administrative Tools" icon.
3. Double-click the "Internet Information Services (IIS) Manager" icon.
4. Expand the "Local Computer" node in the left-hand pane.
5. Right-click on the "SMTP Virtual Server" node and select "Restart."

After following these steps, the error should be resolved and the mail function should be able to send emails successfully.

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