Outlook 2003

[HycoAndy]

I am having trouble emailing certain people. I receive an email back saying
.....

"Your message did not reach some or all of the intended recipients.

Subject: FW: test [Spam score: 9%]
Sent: 19/05/2010 15:52

The following recipient(s) could not be reached:

(e-mail address removed) on 19/05/2010 15:50
You do not have permission to send to this recipient. For
assistance, contact your system administrator.
<mydomian.co.uk #5.7.1 smtp;550 5.7.1 Fix reverse DNS for (MY IP
ADDRESS - 00.00.00.00) or use your ISP's mail server>"

 

[Brian Tillman [MVP-Outlook]]

I am having trouble emailing certain people. I receive an email back saying
....

"Your message did not reach some or all of the intended recipients.

Subject: FW: test [Spam score: 9%]
Sent: 19/05/2010 15:52

The following recipient(s) could not be reached:

(e-mail address removed) on 19/05/2010 15:50
You do not have permission to send to this recipient. For
assistance, contact your system administrator.
<mydomian.co.uk #5.7.1 smtp;550 5.7.1 Fix reverse DNS for (MY IP
ADDRESS - 00.00.00.00) or use your ISP's mail server>"

The last line is the clue. Many mail routers expect to be able to look up the
IP address and get the same name from the lookup as the sending PC claims as
its name. Not having that ability is a sign the sender is a spammer. In this
particular instance, the mail router something.co.uk won't accept the message
unless the IP address and the full name of the PC correctly map to each other.
Your ISP/mail carrier will need to address this. Even the recipient someone
can't fix it by adding you to the safe sender list because his or her mail
client never sees your message.