SMTP error

[Bowl]

SMTP error from remote mailer after MAIL FROM:<nobody@core.mydomain.net> SIZE=1686:
host mx.east.cox.net [68.1.17.3]: 553 core.mydomain.net does not exist

First and formost can i fix this and if so how?

[QT]

It looks like the server is "core.mydomain.net" and it doesnt resolve in DNS, so the remote SMTP server thinks it is someone trying to forge headers.

Make sure that the hostname of the server resolves. :)

[charlie]

you'll have to be a bit more specific on what application is trying to send e-mail out.

my best guess is that you installed some application and that application has core.mydomain.net as part of its configuration file that you may have forgotten to change as part of the setup process or when you moved your servers over from that hosting hosting company.

[Bowl]

its an xmb forum.

and heres the error again

SMTP error from remote mailer after MAIL FROM:<nobody@core.ryu-ken.net> SIZE=1686:
host mx.east.cox.net [68.1.17.3]: 553 core.ryu-ken.net does not exist


So how would i make it resolve cus i went into server beaches dns and added the core subdomain with the servers ip address to ryu-ken.net. But i still got the error.