I found the answer! Actually yesterday I missed validating my email in SendGrid, hence no email was correctly sent.. 

The code in python within Watson Studio notebook for sending is the following : 

!pip install sendgridfrom sendgrid import SendGridAPIClientfrom sendgrid.helpers.mail import Mail, Personalization, Cc, Bcc, To    recipientto=['email1@xxx.com','email2@xxxx.com']message = Mail(    from_email='emailfrom@xxx.com',    to_emails=recipientto,    subject='subject',    html_content=reporthtml)try:    sg = SendGridAPIClient("<<<sendgrid API KEY>>>>")    response = sg.send(message)    print("email sent to ", recipientto)
except Exception as e:    print("error ",e)

Were you running this in WOK/IKC notebook on-premises???

I tried your jode in a notebokk and am getting this error.  Did you not get this?:

I found the answer! Actually yesterday I missed validating my email in SendGrid, hence no email was correctly sent.. 

The code in python within Watson Studio notebook for sending is the following : 

!pip install sendgridfrom sendgrid import SendGridAPIClientfrom sendgrid.helpers.mail import Mail, Personalization, Cc, Bcc, To    recipientto=['email1@xxx.com','email2@xxxx.com']message = Mail(    from_email='emailfrom@xxx.com',    to_emails=recipientto,    subject='subject',    html_content=reporthtml)try:    sg = SendGridAPIClient("<<<sendgrid API KEY>>>>")    response = sg.send(message)    print("email sent to ", recipientto)
except Exception as e:    print("error ",e)

Ciao Mark, I made it from IBM Cloud, activated Email Delivery service from there (https://cloud.ibm.com/catalog/infrastructure/email-delivery), and validated my email in Sendgrid. 

Moreover, you need to change a couple of things in the code you pasted:

1. define reporthtml, in fact it is meant to be a html text, try with the following at the beginning :     reporthtml = "Hello, <br>This is a test email"
2. <<<sendgrid API KEY >>>> is meant to be the APIKEY you need to generate in Sendgrid: go to Sendgrid site, from the menu select "Settings", then "API Keys", and then click on the button "Create API Key"  

Were you running this in WOK/IKC notebook on-premises???

I tried your jode in a notebokk and am getting this error.  Did you not get this?:

I found the answer! Actually yesterday I missed validating my email in SendGrid, hence no email was correctly sent.. 

The code in python within Watson Studio notebook for sending is the following : 

!pip install sendgridfrom sendgrid import SendGridAPIClientfrom sendgrid.helpers.mail import Mail, Personalization, Cc, Bcc, To    recipientto=['email1@xxx.com','email2@xxxx.com']message = Mail(    from_email='emailfrom@xxx.com',    to_emails=recipientto,    subject='subject',    html_content=reporthtml)try:    sg = SendGridAPIClient("<<<sendgrid API KEY>>>>")    response = sg.send(message)    print("email sent to ", recipientto)
except Exception as e:    print("error ",e)