Your message couldn't be delivered because the group you're sending to needs to know who you are before it will accept your message.

To fix this problem, ask the email admin for the group to configure the group to accept messages from you.

For Email Administrators
This error occurs when the group is configured to reject email from senders outside of the group's organization. To fix the issue, the recipient's email admin must either add the sender's address to the group's list of allowed senders or they must select the group's delivery management option that allows senders both inside and outside of their organization to send email to it.

I get the above error msg everytime I send a msg using my gmail.pls guys help me.
Started with interns@accessbankplc.com

its either the emai address is not correct or they have timed the period when they want to receive msg