115.3.1 Can no longer send email from multiple accounts. SMTP Server User Name used to be unique for each account. Now, it is the same across the accounts causing this message: "An error occurred while sending mail. The mail server responded: <[email protected]> sender rejected. The email address you are sending as must match the email address you used to auth. Please check your SMTP settings. AUP#Out-1500. Please verify that your email address is correct in your account settings and try again." I can change the User Name to the correct one but that changes it for all other accounts and I'm back to the same problem. How to solve/correct/work around/whatever? As an aside: what the heck is "auth"? Please use the full word. It does make it easier to understand. Thank you.