It is very important to authenticate your email as it verifies from where the email is coming from and also improves email deliverability. It blocks harmful or fraudulent uses of email such as spamming.
Every organization must do email authentication as it protects their online reputation and also helps the customers to maintain their trust in the brand.
An email bounce is when the email cannot be delivered to the email address you intended to send it to.
Hard Bounce: Hard bounce is an email message with a permanent delivery failure. It could be due to incorrect or invalid email address, outdated domain, etc.
Soft Bounce: Soft bounce is an email with a temporary delivery failure. This could be due to a temporary problem with the recipients’ server like full mailbox, typed incorrect email address, etc.