Luminate Online only marks a record as hard bounced after 2 consecutive hard bounces in a row. For example, the following email history might exist:
  • email to someemail@yourorg.org on 4/1 - hard bounced
  • email to someemail@yourorg.org on 4/2 - no bounce
  • email to someemail@yourorg.org on 4/3 - hard bounced
  • email to someemail@yourorg.org on 4/4 - no bounce

The system would not see these as consecutive hard bounces as there was a send in between the bounces where there was no hard bounce.