Hi Guys,
Following on from my previous topic (http://community.spiceworks.com/topic/483770-two-exchange-servers-one-public-ip-address?page=1#entry...), Im experiencing issues with the relays.
Ive got one exchange server (Win SBS 2k3) which relays emails to a second server (Win Server 2012, Exhcange 2013) (both hosted on my network). I think that the relays are configured correctly but when i change the MX record and test using https://testconnectivity.microsoft.com/ but getting:
The server returned status code 550 - Mailbox unavailable. The server response was: 5.7.1 Unable to relay for adam@w***.com
Exception details:
Message: Mailbox unavailable. The server response was: 5.7.1 Unable to relay for adam@w***.com
Type: System.Net.Mail.SmtpFailedRecipientException
Stack trace:
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender,...