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An updated version of Firefox is available to address the issues with Add-ons disabled or fail to install on Firefox. You can download the update for your OS here: https://www.mozilla.org/firefox/new/ For Known Issues and Workarounds, please check out the update at https://support.mozilla.org/kb/add-ons-disabled-or-fail-to-install-firefox

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what does this mean, the email address is correctAn error occurred while sending mail. The mail server responded: 5.1.0 From address is invalid (VM403). Please

Kuphostiwe

I am unable to send emails, and the following message occurs each time An error occurred while sending mail. The mail server responded: 5.1.0 From address is invalid (VM403). Please verify that your email address is correct in your account settings and try again. I know the email addresses are correct I have been using them continuosly

I am unable to send emails, and the following message occurs each time An error occurred while sending mail. The mail server responded: 5.1.0 From address is invalid (VM403). Please verify that your email address is correct in your account settings and try again. I know the email addresses are correct I have been using them continuosly

Eminye Imininingwane Yohlelo

Isisebenziso

  • I-ejenti Engumsebenzisi: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36

Eminye Imininingwane

Matt
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Kuphostiwe
closing as a duplicate of https://support.mozilla.org/en-US/questions/1218666