"... The remote server returned an error: (403) Forbidden."

When I try to send a msg to my distribution list I get the following error message: “Sending email failed due to the following error. The remote server returned an error: (403) Forbidden.”

Hello Jerry, not quite sure what is this referring to, what version of eM Client are you currently using on your computer, can you please check the exact release number in Help > About? What mail/contacts service are you using with eM Client?

Can you please make a screenshot of the error or copy the content of the log from the log tab when it occurs?