If you want to send immediately, you need to be in 'online' mode and the 'Send' button is available. Then click on 'Send' to send that email.

However, your description sounds like you want to create several emails, store them in 'Outbox' and then send all in one go. In which case do not use 'Send' for obvious reasons. Instead use 'Send Later', then the email will be sent to the 'Outbox' where it will stay until you right click on 'Outbox' folder and choose 'Send unsent messages'.

In a new Write message, in 'online' mode, the 'Send' button will be available. There is a small arrow to the right of 'Send' button, it displays a drop down selection which includes 'Send Later' option.

'File' > 'Send Later' is also available.

If you are in 'offline' mode then the 'Send' button is by default replaced by 'Send Later' button.

'Offline' means Thunderbird is not using the internet, so cannot send an email, hence the 'Send Later' option is only available. You can swap between 'online' and 'offline'.

When in 'Online' mode you will see two blue screen icons in bottom left of Status bar. Clicking on this icon will change to 'Offline' mode and show a two black screen icon. Click ing on that will take you back to 'online' mode.

You do not have to be in 'offline' mode to use 'Send Later' option.

If you are looking for more options such as specifying a time when to send then you may be interested in an addon called 'Send Later 4.3.1'

• https://addons.mozilla.org/en-US/thunderbird/addon/send-later-3/

Thanks Toad,

I don't find any arrow button right side of send button. Any how you have sorted out my issue.