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Mozilla Thunderbird email error message

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  • 1 has this problem
  • 13 views
  • Last reply by sfhowes

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Hello, I've recently started getting this message with some emails I send with attachments, "An error occurred while sending mail. The mail server responded: esmtp: protocol deviation"

Hello, I've recently started getting this message with some emails I send with attachments, "An error occurred while sending mail. The mail server responded: esmtp: protocol deviation"

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