Wordpress Won't Send Contact Form Emails

Bloody DigitalOcean not say and and Bloody DigitalOcean interface not NOTICE that sendmail is always blocked, and you need to get permission with support agent. ;-)

SOLUTION!

The SMTP ports are blocked to avoid spam according to DO, the solution I found at least in wordpress is to create a free account ZOHOMAIL and then do all the DNS records configuration,

https://www.digitalocean.com/community/tutorials/how-to-set-up-zoho-mail-with-a-custom-domain-managed-by-digitalocean-dns

then I installed the WP SMTP plugin in Wordpress

https://cl.wordpress.org/plugins/wp-smtp/

I entered the SMTP configuration for Zoho Mail - SSL

https://www.zoho.com /es-xl/mail/help/zoho-smtp.html

, I ran a test and solved!

All Wordpress one-click droplets have Postfix, a mail server/MTA, installed. You can verify that it’s running by looking at the output of:

sudo ps wwaux | grep postfix | grep -v grep

Try running the following command on your droplet:

nc -z smtp.gmail.com 25

If it does not output the following, it’s possible that SMTP is blocked on your droplet. In that case, please file a support ticket and the support team will take care of it. Thanks!

Connection to smtp.gmail.com port 25 [tcp/smtp] succeeded!