Unfortunately they cannot send e-mails to external users. Sending to internal users works fine. If i don’t use authentication
If i use “Use same settings as my incoming mail server” or try to log on using username & password or domainusername & password the error is “Send test e-mail message: Your e-mail server rejected your login. Verify your user name and password for this account in Account Settings.”
The error is the same if i check “Require SPA”
So i cannot figure that out why outlook cannot authenticate to exchange 2010.
What i miss?
I don’t want to create another receive connector allowing anonymous relay.