Ubuntu 16 + Wordpress + WP Mail SMTP not send contact Form Emails

Hello I looked at several questions and answers but I still have doubts

I installed wordpress in ubuntu 16 I have my emails on hostgator Everything is working well

I installed WP Mail SMTP But the contact form does not send email

Do I need to install postfix? Or php email?


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The forms on my website are not sending emails too, is this tutotial working?

Same problem here! is the tutorial posted above working?


I got the same issue here! If anyone could help, this will be great!