Causes
- The configuration to add an email account is wrong.
- The selected Exchange Server is not accepting the communication from anonymous group.
Solution 1
Please check the settings provided to create an email account. If your Exchange Server does not need an authentication on SMTP, then please uncheck “Requires Authentication.”
Solution 2
Please make sure that the option to enable Anonymous users is enabled in the Hub Transport Settings of Exchange Server.
Perform the following steps to enable the same.
- Open “Exchange Management Console.”
- Go to “Server Configuration” à “Hub Transport.”
- In the right side panel, select the transport to show the receive connectors.
- Double click “Default <Domain>” connector to access its properties.
- Go to “Permission Groups” and check “Anonymous users” option.
Please make sure that this option is checked always.
- Click “Apply” and “OK.”
- Close “Exchange Management Console.”
Now, configure the settings again to add a new email account and try to send the test email again.
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