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Can't send email. Code 4.7.1. All parameters checked, anti-virus deactivated didn't help

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RachelFB
RachelFB
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On my father-in-law laptop, suddenly couldn't send his emails anymore. I've checked the potential issues (anti-virus, parameters) and have alsore-installed his account. Still not working. Same error message: code 4.7.1 - Sender address rejected: Access denied. Any outdated programs could do that? Any other reasons? Should I desintalled Thunderbird completely to re-install it? Thanks for your help!

On my father-in-law laptop, suddenly couldn't send his emails anymore. I've checked the potential issues (anti-virus, parameters) and have alsore-installed his account. Still not working. Same error message: code 4.7.1 - Sender address rejected: Access denied. Any outdated programs could do that? Any other reasons? Should I desintalled Thunderbird completely to re-install it? Thanks for your help!

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Matt
Matt
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My guess is that the SMTP server is not set to use a password.

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