Best services for emails sending

Postmark has been the best in terms of deliverability and also support.

These are many good services for sending emails, but I like Mailtrap the most. You can check artice with info how to send email in PHP using mail() and found all popular options like PHPMailer, Symfony Mailer and the basic PHP email sending principles, syntax, and parameters. Also there is info about the main ways of sending emails with PHP: its built-in mail function and the most popular external mail packages. Recommend to read