User alerts with external email domains not working

Question

I have setup SharePoint outgoing email address in a specific domain i.e. officemail.com. Any alert setup using the same domain email address works fine.

Any user with a different email domain does not get the alerts sent out.

What am I missing here?

Answer 1

You have to make sure that your SharePoint server added into the Exchange relay. So that they can process outside domain address.

In Exchange Server, If anonymous Relay settings is not enabled, then you must add your WFEs in the relay list.? Make sure your ALL Sharepoint WFE's IPs are added in allowed Relays or Receive connectors in Exchange Server. If you use multiple domains, add all of them.

Read more: http://www.sharepointdiary.com/2012/02/sharepoint-alerts-not-working-troubleshooting-checklist.html#ixzz4AzXfHZHu