Email client that places signature at the very end?

There are two places where a signature can be placed: 1) at the end of an email; 2) somewhere else. Option 1 has been favoured since the birth of email, but nowadays option 2 seems prevalent. I prefer 1.

Samsung's native email client is okay for me, except for one thing. It uses 2.

Now I hate gmail, and find Thunderbird too bulky (I use it on Linux). What other options do I have, when it comes to placing signatures at the very end of an email?