Translation - Dear Ladies and Gentlemen, As a long-time user of your email program, I would like to ask for your support in solving the following problem: I have been using Norton 360 PREMIUM as security software for years; Domain and email address are from strato. This always worked without any problems, even after I authenticated the SSL settings a few months ago according to your recommendation. But when installing Norton Safe Email, which is now recommended by Norton, the blocking message "This email provider is not supported" appeared after entering my email address, so that the final download of the new program component was not possible. So I turned to Symantec Norton and got the answer: "I'm really sorry to inform you that your email address does not support our Norton Safe Email because your email provider is not compatible with our Norton Safe Email program." Can I fix the problem in the account settings or what do you recommend I do? I ask you to help me solve the problem [personal info removed]. First of all, thank you very much and best regards! Roland Buchwald

Thunderbird can do nothing to please a separate software's unknown expectations. All I can suggest is to share this with your email provider and possibly inquire to Norton what their requirements are. Is this a self-hosted site? If so, check with the host to see if there might be a more secure setting.. I would also try sending email with Norton turned off to first verify that the account works.