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.
Nothing has changed and I've used this config for years, wht can I no longer send mail?!
Nothing has changed and I've used this config for years, wht can I no longer send mail?!
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Many email providers have increased their security processes. I suggest you review carefully your account settings, as the error message indicates the email address is not consistent.