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Meaning of Error message 5.0.1

Thunderbird Troubleshooting
Matt replied
redroseann
redroseann

My husband has been unable to send or forward e-mails, and gets this message: Error 5.0.1. . . What can we do to fix this?

My husband has been unable to send or forward e-mails, and gets this message: Error 5.0.1. . . What can we do to fix this?

All Replies (1)

Matt
Matt
  • Top 25 Contributor

Chosen Solution

I looked here https://wiki.mattrude.com/SMTP_Status_Codes

They suggest that the email address being sent to is invalid, but do list other less common causes. The do miss one common cause of errors. outgoing email scanning. Turning that nuisance off is often a solutions.