Office 365 MailFlow Scenarios and Best Practices

Microsoft Office 365 gives you the flexibility to configure mail flow based on your requirements and uses scenario to delivered email to your organisation’s mailboxes. The simplest way to configure mail flow is to allow Microsoft EOP to handle spam … Continue reading →

Centralized Mailflow: NDR Remote Server returned ‘550 5.7.1 Unable to relay’

 Environment: Mailbox hosted on the Exchange Online Hybrid on-prem Exchange 2010/2013 with Microsoft Exchange Online Centralized Mailflow configured for Exchange 2013 Route all emails through on-premises configured for Exchange 2010 Accepted domain configured either Managed or Authoritative on the Exchange … Continue reading →