Forum Discussion
I have a few users whose emails are being blocked from sending.
We notice that this only occurs within one domain. M365 are blocking users from sending out emails within the organization. We check to enure that our tenant has not been compromised. This strangely ...
Likely the number of outgoing messages and maybe their content is getting them flagged as spammers.
If these are users that are mass emailing, then maybe signing up for a service that specialized in that might be appropriate as Microsoft's servers aren't intended for mass emails.
