Hi @marcosmilani

It might be because your DigitalOcean account is fairly new, which means that sometimes there’s a filter activated to block SMTP to avoid spam on the platform.
You need to contact Support via the control panel to get unblocked.

Another solution I would recommend that you have a look at SparkPost as an alternative way of sending mails via WordPress.
https://www.sparkpost.com
https://wordpress.org/plugins/sparkpost/

Thank you very much for the real quick reply. I’ve managed to contact support guys (which also replied really quickly) and the problem is now solved =)

Same problem, unfortunately my smtp port is still blocked even though I messaged them.

Hello all,

What I could suggest here is using an SMTP plugin for your WordPress site.

That way you will be able to specify an SMTP server with authentication which your emails would be going through. You could for example use SendGrid’s SMTP service. This would drastically increase the delivery rate of your emails as well compared to using plain PHP mail.

I’ve been using this plugin for a while now and it works very well: Easy WP SMTP.

https://www.digitalocean.com/community/tutorials/how-to-get-wordpress-email-notifications-on-a-digitalocean-droplet

Hope that this helps!
Regards,
Alex