Try this :- https://support.mozilla.org/en-US/kb/cannot-send-messages?esab=a&s=Thunderbird+toolbar+does+not+show+send+button&r=8&as=s

This may help you . Let us know if this work !

Thanks Deb,

    No,and have tried all sorts of things,even the box in customize toolbar has every heading except send!!. Until I get it sorted out I am using Mozilla Firefox to get at my email and there no problem at all,send box is there and it works as does the forward and all other commands.

So until I can get it figured out will use the backdoor way.

Thanks Robin

You are trying to customize the Write window's toolbar?

You can use control+enter to send as a temporary work-around.

Thanks Zenos,

     I will use that method until I get my original problem sorted out

Robin

Ooops. I sent message for updates and that the answer hadn't helped as my "send" button had changed to "send later"and the suggestions hadn't worked. But I discovered that I was somehow disconnected to the internet and after checking and updating my password, it is all now working. Sorry about that.