This depends on the service you want. If we talk about Mautic installation, it requires server details and a Mailwizz access key. Same way, if you want to set up the SMTP server then you need to provide details to access it.
Yes, we provide a frontend panel or tools like Mailwizz with our SMTP service to manage your email campaign. You can upload an email list, set an email template, and start sending emails with our panel. Whereas other email tools like Mailwizz offer more advanced features to send email campaigns.