Forum Discussion
External address error - recipiant primary SMTP is missing
Hello ! I work in a little company and we did our migration to o365 well, I start to get familiar with its potential and I hope some day I will see myself as an office365 Admin I keep discove...
Please provide the error, and if you can a little bit about how you route e-mail. Is the test being sent to this "contact" from on-prem mailbox or o365 mailbox? How is your outbound mail routed, is it to 365 and out, or from 365 to a spam device / gateway?