Emails sent in campaigns can bounce for a number reasons. Common reasons could
be "user over quota", "recipients server temporarily unavailable", "content
rejected". These bounces are classified into soft bounces and hard bounces.
Soft Bounce: When the email has bounced with a reason indicating short
term issues with the recipient, they are flagged as soft bounce. These email
addresses could later be available in future campaigns. They include reasons
like "Quota exceeded", "Too much sessions in a connection", "Temporary
local problem", "Out of Office Auto Reply"
Hard Bounce: When the email has bounced with a reason indicating permanent
issues with the recipient, they are flagged as hard bounces. Chances that these
emails could later be available for future campaigns is less. The reasons for
such bounces could be : "Mailbox not found", "unknown user", "mailbox
is no longer active", "incorrect domain". Benchmark email recommends
cleaning up such emails to improve your statistics for future campaigns.
In case the same contact has hard bounces in three consecutive campaigns,
Benchmark email automatically flags the contact as a "Confirmed Bounce".
A "Confirmed Bounce" contact will be excluded from your active contact
count, and will not be sent any email, if the contact list is selected again.
In case a previously bounced email is opened in another campaign before it
has been flagged as "Confirmed Bounce", the contact's bounce counter
is reset to zero. This allows bounced emails, to remain in the active contact
count and not be flagged as "Confirmed Bounce". The "Confirmed
Bounce" contacts are listed separately in your contact list.