New answers tagged smtp
As your question isn't very clear, this is just a guess. If this is concering adding persons to groups in SP. You can go to - site settings - site permissions. If you want to add a person there you can click advanced and disable to sent them an e-mail. Screenie:
SharePoint WFE are responsible to send the emails to user. I think you are talking about the relay setting. You should enter the WFE Ips their. IP addresses of Web Front End’s in you farm. But if you want to use all servers in the farm then select all except the list below option.
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