I use com_contact to manage contacts.
1 / Is it possible to use sendy without import / export (additional step)
2 / using the fields of com_contact (name, first name) in the body of the email?
3 / ideal to also integrate the custom fields joomla as a filter or in the body of the email?
The Sendy integration we provide for Joomla is for newsletter signup only. There is a signup module which you can let users add their email address to on the front-end and a user plugin that will add users when they register to your site. Once the user is added to Sendy, all administration and management of users and the newsletters themselves is handled within Sendy.
Our integration does not let you pull information from Joomla into Sendy when you send a newsletter, which is what it sounds like you're looking for. The email address and name of the user, when they register, will be available in Sendy, but extra fields or other information would have to be set separately.
I hope that helps explain, but should you need anything else, please let us know.
Thanks for this feedback.
Maybe with zapier I will be able to extract Joomla with custom fields, if not more annoying create several lists by importing on sendy, an extraction csv of com_contact of email and name?
Otherwise it's already interesting with your integration. Are you planning to integrate it into joomla 4?