I have configured SMTP for email testing in my SharePoint Project. I have installed POP Service and created user and mail boxes. When I configure the users in Outlook and test sending mail, I have came up with the following error.
Error: Unable to rely for someuser. Port 25 Secure (SSL). No, Server Error: 550
Solution to rectify this error:
· Type Inetmgr in Run dialog and open Internet Information Services.
· Under Default SMTP Virtual Server Right Click and Select Properties.
· In the Access tab click the Relay button as shown.
· In the relay restrictions popup, You will see the following settings.
· Here Change the Option to “All Except the list below” as shown below.