Topic: Page error

Hi everyone,
I am currently having problems on my PunBB 1.2.17 forum.
The problem is that my when a user selects "Forgot password" and types in their e-mail address to submit it the output error recieved is:

An error was encountered
Error: Unable to send e-mail. Please contact the forum administrator with the following error message reported by the SMTP server: "530 Authentication required ". ทางเข้าufabet
I have tried to google up some stuff but have had no luck.
I am using a domain at GoDaddy that is supposed to be sending the username-password to my the users that request the "forgot password".
Any help is greatly appreciated,

Thanks.