How to send a email with a new line?

I use the SMTP to send a email ,but i found i can not use a new line in the message. could you help me? I try to use ‘\n’,but it not work.

Is it HTML encoded email? If so then you should use HTML commands <br>

haha,I also try the command, but it not work

Is it this you are using?
SMTP - Home Assistant (

Read the part about html

thank you !

it work! thank you so much!!!