Error sending emails to all contacts - do not send
When I answer to customers from the Contact section it gives me an error and the mail that i sent don't arrive to the recipiet. This error happens with all the contacts. I also tried with my email and Jennifer's email (hubspot support) firstname.lastname@example.org
The display errors are:
- There was an issue sending your email. This email has bounced.
- There was an issue sending your email. This recipient looks invalid. Previous sends to this address have bounced.
The email with I answer to the customers is email@example.com
I attach some screenshot