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What is the difference between a hard and a soft bounce?

Hard Bounce: When Pepipost attempts to deliver your emails, then there can be scenarios when the email is not delivered because of some permanent failures. Some of them can be:

  • The email addresses doesn’t exist.
  • The recipient domain (domain/TLD after @in an email address) doesn't exist

Soft Bounce: When Pepipost attempts to deliver your emails, then there can be scenarios when the email is not delivered because of some temporary failures. Some of them can be:

  • The mailbox was full (the user is over their quota)
  • The recipient's server was down
  • The email was too large for the recipient’s inbox
  • The recipient server is currently not accepting emails from the sending IP address
    We do retries for sending soft bounced emails. But, it is always recommended to keep your bounce rate below 5%, as more the bounce rate the more negative will be your reputation with the ISPs.