Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Mozilla サポートの検索

サポート詐欺に注意してください。 私たちはあなたに通話やショートメッセージの送信、個人情報の共有を求めることはありません。疑わしい行為を見つけたら「迷惑行為を報告」からご報告ください。

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

Can't send Bcc anymore

  • 41 件の返信
  • 5 人がこの問題に困っています
  • 51 回表示
  • 最後の返信者: tiger-rka07

more options

I've used Thunderbird for many years, problem free. Suddenly, when trying to send a Bcc email, I get this:

Sending of the message failed.

The message could not be sent using Outgoing server (SMTP) smtp.cox.net for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again.

I've used Thunderbird for many years, problem free. Suddenly, when trying to send a Bcc email, I get this: Sending of the message failed. The message could not be sent using Outgoing server (SMTP) smtp.cox.net for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again.

すべての返信 (1)

more options

Content is usually just text but in the past I've never been restricted in any way as to Bcc content. I have removed all anti-virus programs except Windows Defender and it has been that way for at least a year. Yes, it says 'True'.

  1. 1
  2. 2
  3. 3