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A soft bounce is an e-mail message that gets as far as the supporter’s mail server but is bounced back undelivered before it gets to the intended recipient. This could be an out of office auto- reply, for example.
A hard bounce is an e-mail message that has been returned to the sender because the recipient’s address does not work.
A suppression is an email address that has either hard bounced, seen a number of soft bounces or marked an email as spam. To maintain good reputations with the receiving server and protect email deliverability, suppressed supporters will no longer be sent emails.
Bounce reason | Bounce type | Number of bounces before email becomes suppressed |
|---|---|---|
inactive-mailbox | Hard | 1 |
bad-mailbox | Hard | 1 |
bad-domain | Hard | 1 |
no-answer-from-host | Soft | 3 |
quota-issues | Soft | 3 |
routing-errors | Soft | 4 |
relaying-issues | Soft | 4 |
spam-related | Soft | 99999 |
virus-related | Soft | 99999 |
content-related | Soft | 99999 |
policy-related | Soft | 99999 |
protocol-errors | Soft | 99999 |
bad-configuration | Soft | 99999 |
bad-connection | Soft | 99999 |
message-expired | Soft | 99999 |
other | Soft | 99999 |
invalid-sender | Soft | 99999 |
Viewing bounces and suppressions
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