Cannot send emails - error code 5.5.1- cannot fix
One day my ability to send emails just stopped. The message said, "An error occurred while sending mail. The mail server responded: 5.5.1 Invalid command. Please verify that your address is correct in your account setting and try again." I have checked everything I can and have not discovered any incorrect information regarding the email address. I am able to receive emails as always. What should I do to be able to send emails again. (Can send emails on two Kindles and my desktop computer).
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In order for us to better investigate this issue you need to add a little more non-personal information.
Please add the troubleshooting information to your post To find the Troubleshooting information:
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Please also add the result of these troubleshooting steps to your post
- Does Thunderbird work in TB Safe mode (see Thunderbird Safe Mode)?
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