SMTP Error message

[jfreundn]

I am unable to get my forum mail working at all. I am on a windows server. I can't even send email to an account on my own domain. I have been working on this with my hosting provider. Everything is setup corrected on the forum "says them", this is the error message I get when I send a test message:

"Warning: Unexpected response from SMTP server during TO address transmission in \includes\class_mail.php on line 520"

Message from hosting company:

At this point, the problems seems to be the way the script handles the inputted TO email address. This is the error message I'm getting when I send to my own email address

I really need some help.

Thanks in Advance,
John

[JayJ]

http://www.vbulletin.com/forum/showthread.php?t=160304

Through doing a quick search of the forums, as I do not know the answer to your problem, Steve tends to direct people to their Server Logs to find out exactly what problem occurred.

[jfreundn]

They (My hosting company) is not seeing anything in the log files. And one more question : I am running vBulletin Version 3.5.1, I am sure you are going to tell me to upgrade to 3.5.2. Can you please provide me some feedback on the upgrade process? Any known issues. I do have a few modules loaded and vbPhoto. I could use some advise.

This is my forum:

www.yoursecretconfession.com/forums

Thanks in Advance,
John