in free domain, how will i send email , plz reply

I want to send email from my free domain and hosting server, so what is the procedure of its.......
I want to send email from my free domain and hosting server, so what is the procedure of its.......
Sometimes in mobile phone Bootstrap based website text shown very small and in compute/Desktop it is looks good. What is the reason behind this? It is because of may be in your layout file head section
How many methods is used to include external file in PHP Lanaguage?