I get this message since changing from Wanadoo dial up here in Lanzarote to Telefonica ADSL. It's driving me crazy, can anyone help?
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was xxxxxxxxxxxxxxxxxxxxxxxx. Subject 'Read: Los Calamares 1 of 2', Account: 'pop.wanadoo.es', Server: 'smtp.wanadoo.es', Protocol: SMTP, Server Response: '550 Relay not permitted / No such user', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
You have changed ISP are you still trying to use the E-mail address from your old ISP? This often is not possible and you have to setup a new Account with you new E-mail address provided by you new ISP.