We have a vps hosting a website for a client.
They are hosting mail onsite using exchange.
We have the mx records etc pointing to their server and this has been working for about 4 years without an issue.
Recently the client has been unable to send emails to any email address ending in @hotmail.com
Please find the error messages received below when trying to email.
1. The ip address (masked in this sample as XX.XXX.XXX.XXX) is the ip address of the vps.
So why this ip address would appear when someone is sending mail through their own ip address?
2. What do we need to do so our client can email @hotmail.com email addresses.
We can confirm the masked IP address is not blacklisted anywhere.
Thanks for your help.
The following organization rejected your message: mx4.hotmail.com.
Diagnostic information for administrators:
Generating server: sydneywebhosting.com.au
mx4.hotmail.com #<mx4.hotmail.com #5.0.0 smtp; 550 SC-001 (BAY004-MC5F18) Unfortunately, messages from XX.XXX.XXX.XXX weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.>; #SMTP#