5.7.1 error Need HELP

[R06]

Hello,
i am getting NDR from only one particular domain.whenerver any user send a
message to any email address to any email address to this domain they get a
bounce back with error message

"You do not have permission to send to this recipient. For assistance,
contact your system administrator.
<owa2.aurora.com #5.7.1 smtp;554 5.7.1 Command rejected>"

I dont think there is any permissions issue as users were able to send to
this domain fine in the past.
when i tried to do a Telnet session, it connected fine but when it comes
down to close the email data, there server are not recognizing the end
command ( .)
There email is hosted at yahoo servers and those guys are hard to reach.

I can send them email from hotmail and google, it is only from my domain it
is not working, I need some direction in this issue.
Thanks

[Leif Pedersen [MVP]]

Hi,

Several of the big mail hosters have started to reject mails from IP
addresses they consider dynamic, domains that have no PTR record etc.

You might be able to "solve" this problem by using a smarthost when sending
mails to this domain (do your ISP offer a SMTP service you can use?)

Leif

Post by R06
Hello,
i am getting NDR from only one particular domain.whenerver any user send a
message to any email address to any email address to this domain they get a
bounce back with error message
"You do not have permission to send to this recipient. For assistance,
contact your system administrator.
<owa2.aurora.com #5.7.1 smtp;554 5.7.1 Command rejected>"
I dont think there is any permissions issue as users were able to send to
this domain fine in the past.
when i tried to do a Telnet session, it connected fine but when it comes
down to close the email data, there server are not recognizing the end
command ( .)
There email is hosted at yahoo servers and those guys are hard to reach.
I can send them email from hotmail and google, it is only from my domain it
is not working, I need some direction in this issue.
Thanks

[R06]

thanks for responding, creating a smarthost for local to external domain
still bounces back the messages.
Again bosses does not want to use SMTP services from ISP?
ANy other idea,please let me know.
Thanks
G

Post by Leif Pedersen [MVP]
Hi,
Several of the big mail hosters have started to reject mails from IP
addresses they consider dynamic, domains that have no PTR record etc.
You might be able to "solve" this problem by using a smarthost when sending
mails to this domain (do your ISP offer a SMTP service you can use?)
Leif

Post by R06
Hello,
i am getting NDR from only one particular domain.whenerver any user send a
message to any email address to any email address to this domain they get a
bounce back with error message
"You do not have permission to send to this recipient. For assistance,
contact your system administrator.
<owa2.aurora.com #5.7.1 smtp;554 5.7.1 Command rejected>"
I dont think there is any permissions issue as users were able to send to
this domain fine in the past.
when i tried to do a Telnet session, it connected fine but when it comes
down to close the email data, there server are not recognizing the end
command ( .)
There email is hosted at yahoo servers and those guys are hard to reach.
I can send them email from hotmail and google, it is only from my domain it
is not working, I need some direction in this issue.
Thanks