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

BCC will not send

  • 4 replies
  • 1 has this problem
  • 10 views
  • Last reply by iaxat

more options

Hi, I am using Thunderbird 91.7.0 64bit email. Up until last week I could send emails to multiple addresses via BCC with no problem. This week for some reason I can't, I just get an error message. However, if I send an email to the same people individually it sends ok. I like Thunderbird, but I am fast losing patience with it. There just seems to be too many bugs.

Hi, I am using Thunderbird 91.7.0 64bit email. Up until last week I could send emails to multiple addresses via BCC with no problem. This week for some reason I can't, I just get an error message. However, if I send an email to the same people individually it sends ok. I like Thunderbird, but I am fast losing patience with it. There just seems to be too many bugs.

Chosen solution

what solution? Given the forum is full of folk, with a similar issue that basically have email supplied by Yahoo and sending with a To: address fixes it for Yahoo. I am interested if your solution is the same or if there is more than one thing at play.

Read this answer in context 👍 0

All Replies (4)

more options

Ignore this, I found the solution

more options

Chosen Solution

what solution? Given the forum is full of folk, with a similar issue that basically have email supplied by Yahoo and sending with a To: address fixes it for Yahoo. I am interested if your solution is the same or if there is more than one thing at play.

more options

Same issue, Yahoo email address. Multiple BCC not working in Thunderbird.

Any solution?

more options

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.