can't send email via php mail

[jrbcerrada47]

Hello, i got this error when sending message via php mail.


Gid 28306 is not permitted to relay mail, or has directly called /usr/sbin/exim instead of /usr/sbin/sendmail.


I think the email system is ok because can send message directly to other email like yahoo mail via roundcube webmail.

PHP page email script maybe OK also because users that using our system mail are receiving message without problem.

example,

name@yahoo.com and other emails from outside cannot receive message that generated by PHP mail, then the error above relayed to admin@[I]hyipexaminer.cu.cc[/I]

But [U][COLOR=#000000]u[I]ser1@[/I][/COLOR][I][COLOR=#000000]hyipexaminer.cu.cc [/COLOR][/I][/U]is receiving message that generated by PHP mail without problem. [U][COLOR=#000000][I]user1@[/I][/COLOR][COLOR=#000000]hyipexaminer.cu.cc [/COLOR][/U]is user account within our domain name.

[I]I'm using free hosting for testing but before upgrading to paid I want to clear all error first. If upgrade [/I][I]Maybe I [/I][I]will get the same problem. here is my site [U][I][COLOR=#000000][URL="http://hyipexaminer.cu.cc/"]hyipexaminer.cu.cc[/URL][/COLOR][/I][/U]
[/I]
Please help....