Which is the best free or paid ESP ( Email Service Provider )?

Which is the best email service provider to develop emails for marketing?

What projects should you focus on to boost your javascript skills?

What soft skills are required or preferred while working as a web developer or any other front-end or backend related field?

How can I get help with writing a web developer resume?

I need some tips on writing a web developer resume. Is there a good website or blog for this? Or should my portfolio be enough?