problems with emails after changing host

[Guest]

Hi all,

 

This is the first time I´ve posted since I´m new to OSC I have a store and was working great. Now I have changed the host and everything seemed to work fine until I got my first order and when I changed the order status, which normally would send a notification email to the client I get this error.

 

Warning: mail() [function.mail]: SMTP server response: 504 5.5.2 <single4>: Helo command rejected: need fully-qualified hostname in E:\Sites\Single4\clermany2\webroot\tpsbb\trastienda\includes\classes\email.php on line 520

 

Warning: Cannot modify header information - headers already sent by (output started at E:\Sites\Single4\clermany2\webroot\tpsbb\trastienda\includes\classes\email.php:520) in E:\Sites\Single4\clermany2\webroot\tpsbb\trastienda\includes\functions\general.php on line 22

 

 

Now I have no idea what this means or what to change.

 

Please help.

 

 

Thanks