If I receive a nack in an outbound message, with Salesforce send later messages that are under that same message, or does one nack in the queue block any use of that message? thanks.

1 Answer 1


delivery for OM doesn't preserve order, individual messages have a time based back off if they are nacked, this doesn't affect other messages in the queue. However if you repeatedly nack messages or have a slow ack response time, your queue can end up getting put in the sin bin, where delivery attempts are slower, and retry back-offs are larger, and that'll affect all messages in the queue.

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