When a message is selected in the mailbox window the Reply button will start a reply message to that message. Reply sends only to the sender of the original email.

The Send button may be over on the far left, perhaps even out of sight, depending on the sizing of your Reply window. You can move the Send button to an easier position for you by right-clicking in the toolbar and choosing Customize ... Then just click on Send and hold it and move it to where you want it.

how can I reply to your message if there is no "send" feature. NOWHERE!!!! is there a send button. Not even in "customize" Rod

You didn't say what version you are using. In compose window, see if View shows a mail toolbar option. I am now on 115, but I believe the Send button is on the mail toolbar.

Just confirming what David said: In Version 102.x, click View > Toolbars > check Mail Toolbar, and you'll see your Send button.

Hi Folks, here is what I have, I have been using your mail program for many years, way back to eudora, view,menu bar,quick filter,spaces tool bar,status bar,customize . There is no send, I could be missing something ???? Rod

Brand new computer running windows 11, I have a 10 year old computer running windows 10 running thunderbird with "send". no problems Rod

You need to be in compose pane and then click View.

You aren't looking in the right place. Try again. Go to View (in the Menu Bar -- if you don't see it, tap Alt on your keyboard and it will show up), and in the View menu, you'll see Toolbars at the top. Hover your mouse pointer over Toolbars, and you'll see Mail Toolbar at the top of the fly-out menu. Click on Mail Toolbar and you should see a Send button (at least when you click either Reply or Write).

sorry guys, something is not clicking here, I have spent "hours" on this and getting nowhere. I will have to try this some other time, thanks for trying. Rod