If you use the default e-mail app on the Samsung Galaxy S7, it can happen that an e-mail cannot be sent. This can have different causes, such as a weak Internet connection.
In any case, the e-mail will remain in the mail outbox until the synchronization process is triggered automatically again.
Usually, however, this takes too long and so you would like to send the e-mail manually from the mail outbox. How this works on the Samsung Galaxy S7 with the Android e-mail app, we explain this in our guide:
1. Open the e-mail app of Android
2. Tap on "Inbox" in the upper left corner and then select "Outbox". You will now see the e-mail that has been stuck there
3. Tap this e-mail for a long time
4. Click on "More" on the upper right and then on "Send". Done!
Your e-mail should now be sent from your Samsung Galaxy S7, assuming you have a stable Internet connection. You now know how to send an e-mail from the mail outbox on the Samsung Galaxy S7.