Hello, would it be possible to store the information of success of sending an email
What do you mean by success? After the Send Email action you can update the database.
How do you know if it actually sent the e-mail? 
It could fail due to a SMTP connection error (i.e.: network failure), or it could “fail” due to being rejected the the receipient’s mailbox (e.g.: inbox full)
The first case I guess it would be simple to detect, just wrap the Send Email action inside a Try/Catch, hopefully it would throw an error on failure!
Indeed I will first start to test if the email address is present, and I will see if that is enough for me, but reporting the error or the success of the sending of the email would be practical to determine whether or not I should try to send the email