I installed directadmin on VPS, hosted websites but they don't send emails. I downloaded plugin WP SMTP but can't connect it to SMTP and also can't send emails from DA's roundcube. Can anyone help me? I will pay a small tip (0.06 LTC) since it won't take more than some minutes for those who know it.
PM me or write me on telegram
It takes a little more setting up around the mail server than a simple installation.
@Stalker22 already gave you instructions on what to check. (I guess that info is worth 0.06LTC).
If I were you, I would check the mx records you have at the domain registry, after checking smtp in directadmin, ask your hosting provider to assist you. When you buy VPS or more advanced hosting packages, basic knowledge about these things is expected.