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Error Sending Email - Unable to Relay Email

(2081 views. Last Updated: 2011-05-13 12:19 PM)

Some email servers don't allow you to relay email from an address which contains a domain that is different from the domain where the form is located. For example, let's say you have a form on your domain called and when this form tries to send an email to, your website reports:
Warning: mail() [function.mail]: SMTP server response: 550 5.7.1 Unable to relay for in \www\home\myuser\FORMfields\src\FfForm.php
This happens because your email server will not send emails from, instead it requires emails like You can either:
1. Enable relaying on your email server or contact your hosting company to request that they enable relaying on your email server
2. Or, make sure all emails sent with your form come from
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