> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.reach-book.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What stops a campaign

1. [Campaigns](/reach-book.com-docs/campaigns)

# What stops a campaign

Reach-book.com stops or pauses follow-ups for a prospect automatically when:

What happens

Result

The prospect replies

The sequence stops

The email bounces

The sequence stops

An out-of-office reply arrives

Paused until the return date in the reply, or for 7 days if there's none. Absences longer than 60 days stop the sequence

The prospect unsubscribes

The sequence stops, and the address is blocked in the whole workspace

The address or domain is on the do-not-contact list

Nothing more is sent

The prospect is found to be an existing customer

Follow-ups stop

You record an outcome: Won, Lost, Bad timing, Meeting booked or Qualified

Follow-ups stop or pause

## "Delivery needs review"

If Reach-book.com can't confirm whether an email was delivered, it never retries the send. You'll see **Delivery needs review** and the mailbox pauses until you've checked it, so nobody gets the same email twice.