Soft bounces indicate temporary delivery failures for one or more recipients in your campaign. If you are seeing soft bounces in your campaign reports and need to investigate further, start by locating the Mailing ID for the affected campaign.
Common reasons for soft bounces
- Recipient mailbox is full
- Receiving server is temporarily unavailable
- Message size limits exceeded
- Temporary blocking by the recipient's mail server
How to find the Mailing ID
- Log in to Acoustic Campaign.
- Navigate to Email Campaign from the left-hand navigation.
- Find your mailing in the campaign list.
- Hover over the mailing name to view the Mailing ID in the tooltip or campaign details.
You can also locate sent mailings by navigating to Email > Scheduled and Sent and reviewing the list of completed campaigns.
How to get detailed soft bounce logs
Soft bounce data may take some time to fully populate after a mailing is sent, and detailed bounce information is not always immediately visible in standard reports. To obtain recipient-level soft bounce details and reason codes, contact Acoustic Support with the following information:
- Organization name
- POD number
- Mailing ID
- Date or date range when the soft bounces occurred
Acoustic Support can export detailed bounce logs showing the reason codes associated with each soft bounce event.