We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

New Thunderbird wont allow me to send to more than one address. Wont display emails as read after opening.

Sarah McColl
Sarah McColl
more options

I have the latest Thunderbird installed and have recently changed computers. For some reason there is a solid black line at the top of my inbox. When a new email comes in and I open and read it, it will still appear unread in bold. If I try and hit reply to that email and add another email address in, it wont let me. The original email address is highlighted in gray. Thanks!

I have the latest Thunderbird installed and have recently changed computers. For some reason there is a solid black line at the top of my inbox. When a new email comes in and I open and read it, it will still appear unread in bold. If I try and hit reply to that email and add another email address in, it wont let me. The original email address is highlighted in gray. Thanks!

Chosen solution

Does it improve if you start in safe mode ? https://support.mozilla.org/en-US/kb/safe-mode-thunderbird

Read this answer in context 👍 1

All Replies (2)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Does it improve if you start in safe mode ? https://support.mozilla.org/en-US/kb/safe-mode-thunderbird

Sarah McColl
Sarah McColl Question owner
more options

Thanks so much Wayne. That worked, so I then went on to remove the addon that was causing the trouble. Cheers