rasa.io takes list hygiene and email deliverability very seriously so we will always automatically unsubscribe emails that return a hard bounce. However, there are several other factors that go into maintaining a clean list. List maintenance is incredibly important for a number of reasons. Sending to invalid or unverified email addresses can have a negative impact on your sender reputation, deliverability, engagement rates and it will put you at risk of being added to email blacklists.
So, how can you avoid this?
We recommend regularly scrubbing your lists using an email verification service. These services will identify the emails that are no longer valid, spam traps or likely to bounce. Once you’ve removed those emails from your list, you will reduce your bounce rate and improve your metrics around deliverability as well as engagement.
As always, please reach out to support@rasa.io for more information or if you have questions about list cleaning and maintenance.