Sending email from websites
From ULYSSIS documentation
Sending email is fairly similar on most hosting service. ULYSSIS hosting is not too different in that sense. We do use a queueing system to detect accounts that are being abused by malicious actors to send spam.
How?
In PHP and most other programming languages, content management systems (CMS), and frameworks, you can use the buildin email function. This may be referred to with names such as buildin, default, standard, local or sendmail.