This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Thunderbird E-Mail BCC

  • 1 reply
  • 1 has this problem
  • 24 views
  • Paskiausią atsakymą parašė sfhowes

more options

I can send out to a list with CC or TO. However, when I attempt to use BCC, I get a message:

Sending of the message failed.

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

This happens with ALL my email accounts, so it MUST be something in Thunderbird. Now, I was sending out group emails this way until a few days ago. After that, this started happening.

Patrick Mower

I can send out to a list with CC or TO. However, when I attempt to use BCC, I get a message: Sending of the message failed. The message could not be sent using Outgoing server (SMTP) smtp.mail.yahoo.com for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again This happens with ALL my email accounts, so it MUST be something in Thunderbird. Now, I was sending out group emails this way until a few days ago. After that, this started happening. Patrick Mower

All Replies (1)

more options