Bounces are classified in two ways; hard and soft. Soft bounces in Send will show in the Campaign reporting, as these are temporary bounces which can vary from one Campaign to the next. Soft bounces can mean multiple things, one being the mailbox was full at the time of sending meaning the email couldn't make it to the inbox so it's bounces. However, if the mailbox was emptied by the next send, it would hit the inbox and the recipient would no longer have a bounce recorded against them.
Hard bounces record as 'bounced' in the address book, and work similarly to opt outs in the way that you cannot send additional Campaigns until their record is updated. This could be either with a new domain/email, or resetting the bounce status by clicking the drop down menu next to the contact.
Note: Rather than sending an entirely new Campaign, you can go into the Campaign report and click the drop down menu next to the recipient and click resend. But, please do note that this will not only resend to soft bounces, but also to the hard bounces which can negatively affect your deliverability.
We'd always recommend keeping clean lists and routinely checking and removing recurring bounces. For more tips on deliverability, click here.
Examples of soft and hard bounces you may come across are:
Soft
- DSN Problems
- Flagged as spam
- Server offline
- Relay problem
- Routing problem
- Quota exceeded
- Policy related
- Connection error
- Delivery timeout
-
Account inactive
-
Mailbox full
- Server misconfigured
Hard
- Invalid address
- Domain does not exist
- Inactive address
- Invalid syntax
- User not found
- Invalid domain
Note: All bounces are logged as a negative score against your contacts
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