Microsoft’s TERRL sending limits are already catching organizations off guard, and the consequences aren’t just inconvenient, they’re business-critical. In this episode, we break down what TERRL really means and why exceeding it can shut down your external email overnight. If your company relies on outbound communication, you won’t want to miss this episode.

On this week’s episode of “OK. Got it.”, Retarus Messaging Evangelist, Marcus Ionker, breaks down what it really means to future-proof your organization’s communication strategy. From modernizing fax in the digital age to combining fax, email, and SMS with intelligent automation, discover ways to evolve your messaging workflows without disrupting the processes you rely on today.

What does a messaging solution need to have in order to generate a high delivery rate?

Fax remains essential across industries like healthcare, insurance, finance, and government, where compliance and guaranteed delivery are non-negotiable.

As Marcus explains, “Fax is always critical messaging. You can’t afford for it not to go through.” In the episode, Marcus highlighted several key technical and operational factors that determine whether a fax successfully reaches its destination:

• Data Quality – Invalid or outdated fax numbers are still one of the biggest causes of failure.
• Recipient Capability – The receiving system’s setup (analog, IP, hybrid) affects whether a fax can connect.
• Retry Logic – Granular retry intervals and expiration settings help maximize success without wasting time.
• Routing Intelligence – Modern fax platforms should automatically switch carriers or hardware stacks to find the best route for each transmission.
• Detailed Reporting – Comprehensive delivery reports allow you to pinpoint why a fax failed, not just “busy” or “error,” but exact root causes and suggested next steps.