Destination System Unreachable Metric

The destination system unreachable hard bounce type means that there was a connection issue with the email server.

What Does The Destination System Unreachable Metric Represent?

The destination system unreachable hard bounce type means that there was a connection issue with the email server.
Tip: For more information on the bounce classification system, see Email Bounce.

Why Is The Destination System Unreachable Metric Important?

A destination system unreachable hard bounce is different than a bad email address hard bounce (which results in immediate removal of the contact in question). This bounce type means that we will not retry sending this specific email to this specific contact at this time because it is not likely to succeed. Later deliveries to the contact may succeed.

Tip: For more information on hard bounces, see Email Bounce.

How Is The Destination System Unreachable Metric Calculated?

The destination system unreachable metric is a total of the bounces that were classified as hard bounces due to the destination system being unreachable.