You can use dynamic placeholders in both regular email templates and mass mailings. The syntax is ${object.field}. To add a simple personalized salutation to a mass mailing sent to a contact, use an expression like "Hi ${object.name}".

A more robust expression would be something like: 

Hey ${not object.is_company and object.name and object.name.lower().replace('*', '').replace('(closed)', '').replace('closed', '').title().strip().split()[0] or 'There'},

You can access a placeholder generator within Odoo by navigating to Settings/Technical/Email/Templates, opening a template, then opening the "Dynamic Placeholder Generator" notebook page.

i need also a solution. Can you help me. I want to Insert the Name of an Contact (res.partner) inside an Text Block. 

Can you also use dynamic placeholders and merge tags in marketing automaiton e-mails? If yes, is there a list of tags and/or shortcodes that we can use for reference? Thanks.

Any ideas?