# SMTP Server Response

**URL:** <https://forum.kirupa.com/t/smtp-server-response/84050>\
**Category:** programming\
**Created:** [March 24, 2005, 8:20am UTC](https://forum.kirupa.com/t/smtp-server-response/84050 "2005-03-24T08:20:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Patriotxcountry](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/patriotxcountry/32/1110_2.png) [@Patriotxcountry](https://forum.kirupa.com/u/Patriotxcountry)\
**Post date:** [March 24, 2005, 8:20am UTC](https://forum.kirupa.com/t/smtp-server-response/84050/1 "2005-03-24T08:20:06Z")

</div>

I have used php scripts to send form data in the past, however I have made one for a client and their server is giving me this error response:

> SMTP server response: 550 5.7.1 Unable to relay for [me@blahblah.com](mailto:me@blahblah.com) in **D:\blah\blah\send\_blah.php** on line **19**

I realize that blocking external relaying prohibits malicious users from using that machine to send bulk unsolicited e-mail messages.

So if I understand correctly, say I have [www.MyCoolSite.com](http://www.MyCoolSite.com), should it allow me to send an email relay to [me@mycoolsite.com](mailto:me@mycoolsite.com)?

PXC