What is a Bounce?
A bounce occurs when SendScale attempts to deliver an email, but the recipient's server rejects it.
Soft Bounce: Temporary delivery failure (e.g., Mailbox Full, Server Offline). SendScale may retry these.
Hard Bounce: Permanent failure (e.g., Email Address Does Not Exist, Domain Blocked). SendScale immediately suppresses these leads to prevent future attempts.
The Danger Zone (>3%)
Your Bounce Rate is the single most critical metric for domain longevity.
Safe Zone: 0% - 2%
Warning Zone: 2% - 5%
Danger Zone: > 5%
Why it matters: If you consistently hit >5% bounce rates, Google and Outlook will label your domain as a "Spammer" because it indicates you are buying low-quality lists and guessing emails. This will cause even your valid emails to land in spam.
How to Lower Bounce Rates
If your analytics show a high bounce rate:
Pause the Campaign: Do not keep sending.
Check Verification: Did you use the "Enrich" feature in SmartSearch? Ensure you are only sending to "Valid" (Green Shield) leads.
Exclude "Unknown": In your campaign "Leads" tab, filter by "Unknown" status and delete them or move them to a separate, lower-volume campaign sent from a burner domain.
List Hygiene: If you imported a CSV from 2 years ago, the data has decayed. Re-verify the list using SendScale's verification tool before resuming.